These words all come from real CIE past papers, the number beside the word is the total number of times it has appeared in exams. 850 reaction 379 mol 378 scheme 353 compound 349 suggest 336 acid 300 formula 300 following 287 equation 251 group 249 calculate 243 water 241 explain 227 step 216 formed 214 solution 211 data 211 correct 209 structure 196 state 182 draw 171 structural 162 compounds 159 conditions 153 molecule 153 atoms 149 reagent 147 bonds 142 present 140 amino 131 reagents 128 schemes 128 reactions 125 electrons 124 rate 121 organic 121 given 121 diagram 118 molecules 117 elements 117 element 117 bond 116 polymer 115 gas 115 copper 110 produced 108 ph 103 enthalpy 103 describe 102 dm–3 100 mol–1 99 indicate 99 dna 98 temperature 98 form 97 part 95 product 95 acids 94 chloride 92 units 92 bonding 91 structures 91 h2so4 91 groups 90 shown 90 publisher 90 place 90 first 90 copyright 90 contains 89 functional 88 equilibrium 88 could 87 such 87 molecular 86 oxidation 85 oxygen 84 formulae 84 atom 83 subsidiary 83 structured 83 order 82 discussions 82 co2h 81 high 80 moles 80 mixture 80 ions 80 because 79 observation 79 excess 79 examination 79 complete 79 answers 78 teachers 78 max 77 value 77 under 77 sodium 77 papers 77 eg 77 chlorine 77 chemical 76 nitrogen 76 he 75 sulfur 74 there 73 react 72 syllabuses 72 protein 72 al 71 many 70 reacts 70 material 70 balanced 69 so2 69 so 69 less 69 aqueous 68 their 68 amount 66 pages 66 dilute 65 ch2 64 products 64 produce 64 oxide 64 hence 64 formation 64 colour 63 reacted 63 pressure 63 materials 63 electron 63 addition 62 they 61 sample 61 combustion 61 alcohol 60 chemistry 60 aid 59 standard 59 no2 59 kc 59 case 59 also 58 working 58 si 58 due 57 values 57 should 57 forms 56 white 56 read 56 process 56 point 56 peak 56 dm 56 chain 56 anode 56 added 55 solid 55 lone 55 drug 55 consists 55 carried 55 appropriate 54 ppt 54 oxides 54 occurs 54 nh3 54 general 54 etc 54 concentrated 54 °c 54 before 53 provided 53 proteins 53 metal 53 magnesium 53 identify 53 experiment 53 cell 52 nh2 52 needed 52 ion 52 heated 52 down 52 construct 52 cathode 51 maximum 51 isomers 51 important 51 enzyme 51 alternative 50 volume 50 test 50 solvent 50 reason 50 produces 50 intermediate 49 peaks 49 pair 49 o2 49 ionic 49 ar 48 suitable 48 species 48 gives 48 found 48 either 47 then 47 tertiary 47 properties 47 printed 47 phenol 47 considered 47 blue 47 aq 47 acidified 46 trace 46 small 46 report 46 relevant 46 reasonable 46 isomerism 46 every 46 document 46 displayed 46 containing 46 catalyst 45 unwittingly 45 thirdparty 45 syndicate 45 sought 45 showing 45 requiring 45 reproduce 45 relative 45 protected 45 pleased 45 permission 45 owned 45 overall 45 opportunity 45 mr 45 mg 45 meant 45 local 45 itself 45 instructed 45 holders 45 examiners 45 ethanol 45 ester 45 effort 45 earliest 45 during 45 department 45 cleared 45 clearance 45 brand 45 ammonia 45 amends 45 additional 44 spectrum 44 shape 44 sequence 44 second 44 published 44 proton 44 points 44 marking 44 ∆h 44 cl2 44 candidates 44 br2 44 box 43 together 43 term 43 raw 43 nmr 43 meeting 43 iron 43 enter 43 covalent 43 conc 43 boxes 42 up 42 took 42 soluble 42 requirements 42 ratio 42 melting 42 explanation 42 details 42 basis 42 aluminium 42 about 41 results 41 reflux 41 publishing 41 ordinary 41 numbers 41 low 41 fuel 41 four 41 conjunction 41 ch3co2h 41 began 40 them 40 sio2 40 polymers 40 obtained 40 empirical 40 chains 40 another 39 required 39 methanol 39 liquid 39 information 39 charge 39 bromine 39 br2aq 38 precipitate 38 minutes 38 light 38 isomer 38 ionisation 38 hot 38 hand 38 forces 38 equations 37 protons 37 period 37 over 37 naohaq 37 include 37 end 37 colourless 37 changes 37 acceptability 36 van 36 through 36 primary 36 phenylamine 36 oil 36 ligand 36 initial 36 electrode 36 effect 36 determine 36 correspondence 36 connection 36 cells 36 benzene 35 time 35 skeletal 35 separate 35 room 35 large 35 ie 35 enzymes 35 contain 35 chromatography 35 air 34 very 34 types 34 transition 34 substitution 34 secondary 34 positive 34 periodic 34 ore 34 condensation 34 chiral 34 18 33 Δh 33 yellow 33 work 33 spaces 33 ring 33 known 33 kmno4 33 hour 33 graphs 33 gases 33 dm3 33 diagrams 33 clearly 33 010 32 third 32 symbols 32 pairs 32 n2 32 higher 32 guidance 32 converted 32 broken 31 smaller 31 result 31 q 31 percentage 31 mechanism 31 hno3 31 fe 31 dipole 31 constant 31 column 31 calcium 30 synthesis 30 row 30 placed 30 often 30 increases 30 deduce 30 dc 30 curly 30 concentration 30 cold 30 ch3oh 30 carry 29 ▼ ☎✆ 29 xray 29 vi 29 sulfate 29 substrate 29 similar 29 repeat 29 isotope 29 h2s 29 green 29 greater 29 expression 29 dioxide 29 difference 29 ch3cho 29 candidate 29 around 28 technique 28 substance 28 see 28 responsible 28 phosphorus 28 monoxide 28 lower 28 least 28 le 28 label 28 k2cr2o7 28 increase 28 education 28 drugs 28 certificate 28 basic 27   27 sulfuric 27 states 27 stable 27 potassium 27 oxidised 27 orange 27 monomer 27 i2 27 correctly 27 concentrations 27 1000 27 020 26 whether 26 side 26 presence 26 polypeptide 26 negative 26 measured 26 labelled 26 hydrolysis 26 complex 26 after 26 04 25 strong 25 sn2 25 respect 25 observations 25 negates 25 nabh4 25 method 25 major 25 laboratory 25 ignore 25 identity 25 heating 25 hcn 25 h3c 25 dissolves 25 density 25 centre 25 arrow 25 apparatus 25 005 25 ✘✎✙❞✚❞✎✑✛✏✣✦ 24 € ✕✂☎ 24 € ✁✂ 24 ☛✂ ✞✟✂☎☞✌ 24 ✝❙✒✒ ✓✔☞ 24 waals’ 24 useful 24 silver 24 silk 24 power 24 occur 24 nickel 24 nh 24 new 24 means 24 just 24 involved 24 instead 24 hydrocarbon 24 hbr 24 example 24 engine 24 described 24 crystallography 24 cc 24 brackets 24 boiling 24 acidic 24 105 23 unit 23 terms 23 sn 23 since 23 simple 23 right 23 red 23 reasons 23 ⑩r③ 23 property 23 production 23 pbo2 23 passed 23 none 23 lose 23 line 23 li 23 lattice 23 ksp 23 hydrocarbons 23 graph 23 electrophoresis 23 charges 23 become 23 a2 23 970142on09 22 yield 22 words 22 steps 22 salt 22 resulting 22 polymerisation 22 pencil 22 nucleophilic 22 need 22 na2o 22 mole 22 metals 22 interactions 22 including 22 further 22 decreases 22 cuh2o62 22 cr2o72 22 core 22 common 22 chlorides 22 being 22 atmosphere 22 alkene 22 alkaline 22 al2o3 22 25 22 16 22 15 22 13 21 ✽ ✞ 21 whereas 21 way 21 tick 21 stage 21 sketch 21 single 21 samples 21 rough 21 reduction 21 reduced 21 readily 21 range 21 pcl5 21 partition 21 –oh 21 nm 21 much 21 likely 21 increasing 21 human 21 h3po4 21 h2o2 21 gaseous 21 fumes 21 energies 21 easily 21 briefly 21 body 21 barcodes 21 active 21 250 21 14 20 ❬☛✏❩ ✒✡ 20 those 20 take 20 sign 20 sheet 20 minimum 20 main 20 left 20 internal 20 ho2c 20 had 20 h2nch2co2h 20 follows 20 esters 20 environmental 20 ca 20 batteries 20 arrows 20 80 20 6h2o 20 40 20 24dinitrophenylhydrazine 20 20 20 19 20 18 20 17 19 toxic 19 titanium 19 strand 19 specific 19 series 19 represent 19 reducing 19 redox 19 pka 19 pb 19 occurring 19 ni 19 ne 19 min 19 mgo 19 lines 19 lead 19 hexane 19 h2g 19 gel 19 dissolve 19 components 19 completely 19 cannot 19 bases 19 balance 19 atomic 19 amide 19 accept 19 970143on11 19 970143on10 19 970143mj11 19 970143mj10 19 970142on11 19 970142on10 19 970142mj13 19 970142mj12 19 970142mj11 19 970142mj10 19 970141on11 19 970141on10 19 970141on09 19 970141mj12 19 970141mj11 19 970141mj10 19 970104on08 19 970104mj09 19 970104mj08 19 45 19 19 19 02 19 01 19 ………………………………………… 19 ……………………………………… 18 tollens’ 18 tank 18 stereoisomerism 18 site 18 residues 18 radium 18 pure 18 peptide 18 pcl3 18 outline 18 nucleus 18 nh42so4 18 mention 18 me 18 making 18 larger 18 khco3 18 here 18 fission 18 ethylamine 18 ea 18 conductivity 18 condition 18 car 18 buffer 18 analysis 18 absorbed 18 90 18 4hcl 18 4h 17 years 17 t✼✳ 17 space 17 so3 17 sno2 17 silicon 17 role 17 removed 17 reacting 17 purple 17 predict 17 phosphate 17 pb2 17 partial 17 pale 17 orbitals 17 nanotubes 17 mno4– 17 mno4 17 intermolecular 17 insoluble 17 hf 17 hair 17 glycine 17 fully 17 fragments 17 flask 17 fingerprinting 17 environment 17 cu2aq 17 cu 17 cn 17 ch3cocl 17 argon 17 500 17 50 17 30 17 –1 16 wrong 16 tin 16 thus 16 start 16 spectroscopy 16 solubility 16 sicl4 16 route 16 residue 16 reactants 16 radioactive 16 position 16 pollutants 16 per 16 particular 16 opposite 16 oh–aq 16 nuclear 16 nb 16 named 16 nacl 16 monomers 16 might 16 long 16 lialh4 16 k2co3 16 iodine 16 identified 16 ideal 16 homolytic 16 goes 16 fuels 16 free 16 fewer 16 explaining 16 exhaust 16 ethene 16 electronic 16 electrolysis 16 cu2 16 considering 16 ch4 16 ch3coch3 16 cation 16 catalytic 16 base 16 available 16 anion 16 amounts 16 agent 16 ag 16 activity 16 according 16 3c 16 2e 16 050 16 00200 16 ………………………………… 15 wrt 15 within 15 vapour 15 uses 15 turns 15 trans 15 takes 15 taken 15 system 15 substances 15 steel 15 solutions 15 size 15 reverse 15 pr3 15 pbo 15 orbital 15 oh– 15 mno2 15 mgcl 15 methanoic 15 lawsone 15 ketone 15 hydroxide 15 highly 15 haber 15 h2og 15 fe3 15 exothermic 15 ethyl 15 electrolyte 15 double 15 disulfide 15 crude 15 compare 15 coloured 15 carboxylic 15 byproduct 15 add 15 970143mj13 15 970141mj13 15 4h2o 15 42– 15 244 15 ½o2 15 006 15 002 15 ½ 14 ▼ ❙✙✜✔✑✂ 14 βpleated 14 we 14 variation 14 trend 14 techniques 14 synthesised 14 stronger 14 stated 14 starting 14 significant 14 shaken 14 reduce 14 radius 14 propene 14 propanone 14 piece 14 owtte 14 o2g 14 na2co3aq 14 menthone 14 makes 14 living 14 lactic 14 k2cr2o7h 14 isotopes 14 illustrate 14 hoch2cho 14 help 14 h2ol 14 giant 14 ge 14 food 14 fe2 14 exists 14 evolved 14 electrodes 14 electricity 14 electrical 14 drawn 14 directly 14 cis 14 chosen 14 c14h30 14 burned 14 although 14 alcohols 14 alanine 14 acetal 14 970142 14 970141 14 970121 14 3p 14 32 14 2s 14 2hcl 14 1s22s22p6 14 10–3 13 zinc 13 variant 13 turn 13 strands 13 socl2 13 slowly 13 represents 13 rather 13 principal 13 phase 13 pesticide 13 peg 13 outer 13 organisms 13 nahco3 13 na2co3 13 moves 13 manufacture 13 lysine 13 lithium 13 like 13 knowledge 13 kg 13 intermediates 13 inhibitor 13 inert 13 indigo 13 increased 13 i2aq 13 hours 13 half 13 final 13 ethanoate 13 endothermic 13 elimination 13 distinguish 13 delocalised 13 delivery 13 current 13 crco6 13 construction 13 composition 13 co2g 13 ci 13 ccl 13 burns 13 break 13 black 13 assume 13 area 13 applied 13 allowed 13 aldehyde 13 acidbase 13 106 13 10–2 12 vehicles 12 undergoes 12 tonne 12 thinlayer 12 surface 12 strongly 12 stereoisomers 12 sroh2 12 solvents 12 sn4 12 slow 12 sidechains 12 seen 12 rhs 12 remains 12 recent 12 reactivity 12 rain 12 quantity 12 prepared 12 potential 12 positions 12 original 12 ores 12 nh3aq 12 needs 12 nature 12 natural 12 nanoparticles 12 mouth 12 modern 12 mn2 12 m2 12 letter 12 leadacid 12 kmno4h 12 joined 12 hydroxyethanal 12 hx 12 hno2 12 h3o 12 forward 12 extracted 12 ethanoic 12 equal 12 dipoles 12 differences 12 decrease 12 corresponding 12 college 12 –co2h 12 child 12 changed 12 chalcopyrite 12 ch3co2ch2ch3 12 ch3cl 12 causes 12 carbonate 12 c2h5cl 12 bromide 12 bi 12 behave 12 becomes 12 baso4 12 approximate 12 970122 12 54 12 400 12 2naoh 12 2cl 12 160 12 133 12 120 12 0240 11 zn 11 without 11 warming 11 vii 11 until 11 typical 11 treated 11 transport 11 traditional 11 tonnes 11 titration 11 sulfide 11 ss 11 soft 11 so2g 11 skin 11 sf6 11 school 11 replaced 11 radical 11 permanent 11 pb2aq 11 pass 11 pa 11 own 11 optical 11 onto 11 off 11 observed 11 noncompetitive 11 nh4 11 neutral 11 mrna 11 letters 11 individual 11 hydrophilic 11 hydration 11 hg2 11 gly 11 fossil 11 for 11 fluoride 11 fertilisers 11 fertiliser 11 exchange 11 ethanolamine 11 error 11 engines 11 electrophilic 11 dme 11 disadvantage 11 depends 11 deduct 11 cracking 11 convert 11 collected 11 cistrans 11 choose 11 cho 11 centres 11 called 11 c2h2 11 c 11 breaking 11 breakdown 11 blood 11 best 11 atm 11 ant 11 angle 11 ammonium 11 alkenes 11 affect 11 aerosol 11 activation 11 able 11 970123on11 11 970123on10 11 970123mj12 11 970123mj11 11 970123mj10 11 970122on11 11 970122on10 11 970122on09 11 970122mj12 11 970122mj11 11 970122mj10 11 970122mj09 11 970121on11 11 970121on10 11 970121on09 11 970121mj13 11 970121mj12 11 970121mj11 11 970121mj10 11 970121mj09 11 970102on08 11 970102mj08 11 918523mj13 11 44 11 3h2o 11 3d 11 2no 11 000 10 whole 10 weak 10 warmed 10 voltage 10 various 10 usually 10 trypsin 10 tripeptides 10 tollens 10 titrated 10 symbol 10 strength 10 strategy 10 stomach 10 stating 10 stages 10 scl2 10 ✴s 10 pva 10 propenoic 10 physical 10 pepsin 10 paired 10 nothing 10 nnaoh 10 neutralisation 10 names 10 methods 10 manufactured 10 manganatevii 10 lys 10 lists 10 ka 10 it’s 10 indicating 10 hydrolysed 10 hydrogencarbonate 10 hydrochloric 10 hydride 10 heavy 10 hclaq 10 glass 10 giving 10 five 10 figures 10 field 10 fehlings 10 experiments 10 exist 10 examples 10 evidence 10 ethanedioate 10 ethanedial 10 ethanal 10 environments 10 empty 10 e– 10 ‘dotandcross’ 10 direction 10 description 10 deep 10 decomposition 10 damage 10 cysteine 10 cyclohexanol 10 cr3 10 contact 10 complexes 10 compared 10 chlorobenzene 10 ch3ch2oh 10 ccl2f2 10 calculated 10 biodiesel 10 bcl 10 axes 10 attached 10 andor 10 amylase 10 almost 10 alloy 10 alcl3 10 advantage 10 adsorption 10 absorb 10 970143 10 970123 10 73 10 56 10 2g 10 2e– 10 225 10 –2 10 1bromobutane 10 179 10 1200 10 10–4 10 030 10 012 10 0025 10 0016 9 widely 9 while 9 ways 9 warm 9 unsaturated 9 treatment 9 times 9 thermal 9 terylene 9 ⑧❶③t 9 suggested 9 studied 9 split 9 solids 9 six 9 sicl 9 several 9 separation 9 separately 9 sea 9 saturated 9 ✥✣✑s✣✣✙ 9 restriction 9 remaining 9 released 9 reactant 9 rates 9 pyrolusite 9 pv 9 pt 9 processes 9 ppm 9 particularly 9 p4o10 9 oxidising 9 ok 9 nitrogenous 9 nitride 9 nano2 9 mineral 9 medium 9 loss 9 list 9 lhs 9 last 9 largest 9 kw 9 kcn 9 inorganic 9 injection 9 held 9 haemoglobin 9 graphite 9 gets 9 full 9 fehling’s 9 fast 9 effective 9 disposable 9 determined 9 dehydration 9 define 9 decolourises 9 curve 9 cucl42 9 cs2 9 crosslinking 9 copperii 9 converter 9 conventional 9 contained 9 consistent 9 coefficient 9 cl2g 9 ch3ch2cho 9 ch3ch2chch2 9 ch2oh 9 certain 9 cause 9 caoh2 9 calculation 9 cacl2 9 c2h6 9 c2h4 9 butan1ol 9 burning 9 bas 9 bacteria 9 away 9 attraction 9 atmospheres 9 asterisk 9 assuming 9 –aq 9 ans 9 allotrope 9 ala 9 acidity 9 ability 9 75 9 64 9 635 9 300 9 2oh 9 2o3 9 2no2 9 2h2ol 9 2h 9 298 9 27 9 24 9 107 9 10–5 9 077 9 004 9 0008 9 ✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿✿ 8  ✑❖ 8 βkeratin 8 waals 8 visible 8 variety 8 trna 8 triplet 8 tests 8 ✴❁❊❛t❋❯❁ 8 ✉✈✇①t❻ 8 supply 8 study 8 steam 8 specified 8 sncl2aq 8 smell 8 slightly 8 sizes 8 science 8 saves 8 relatively 8 reasoning 8 reactive 8 reach 8 rcl 8 provide 8 propellants 8 propanal 8 prevent 8 plane 8 phosphorusv 8 phenacyl 8 pentane 8 pbcl2 8 p4o6 8 p4 8 outermost 8 ona 8 o– 8 nitrobenzene 8 nitrate 8 nh4f 8 neutrons 8 necessary 8 nax 8 naturally 8 n2o 8 movement 8 mixed 8 mg2 8 methyl 8 metallic 8 mentioned 8 menthol 8 malic 8 magnetic 8 ‘low’ 8 ligands 8 li3n 8 levels 8 lakes 8 kp 8 kmno4oh 8 ketene 8 k3fec2o43 8 induced 8 incomplete 8 hydrogel 8 hydrazine 8 –hnchch3co– 8 –hnchch2shco– 8 ‘high’ 8 halogenoalkanes 8 haem 8 h2so3 8 h2n 8 greenhouse 8 glycol 8 geometrical 8 flexible 8 fit 8 filter 8 fe3aq 8 faster 8 extract 8 enables 8 electronwithdrawing 8 effects 8 distillation 8 dissolved 8 differ 8 diesel 8 diaphragm 8 cus 8 cuo 8 cunh342 8 –cooh 8 conduct 8 competitive 8 commonly 8 cog 8 circle 8 chlorogenic 8 ch3ohg 8 ch3chch2 8 ch3ch2ch2ch2oh 8 ch3ch2ch2ch2br 8 cfcs 8 cch33 8 carbonyl 8 c2h5 8 c15h32 8 bonded 8 behaves 8 battery 8 barium 8 allyl 8 alkanes 8 agents 8 agaq 8 acts 8 92 8 84 8 436 8 3s 8 35 8 2o2 8 2o 8 –286 8 240 8 210 8 05 8 016 8 0100 8 0050 8  7 π 7 zwitterion 7 writing 7 well 7 waste 7 us 7 upper 7 treat 7 too 7 tissues 7 testtube 7 ❁❇❉❊❛❅❛t❋✳❅ 7 ❀✳✴✴❁❀t 7 ④✈④③✇t 7 suggests 7 steamy 7 stationary 7 spectrometry 7 special 7 sources 7 solubilities 7 so42 7 shielding 7 shell 7 sheets 7 sf 7 ser 7 score 7 rna 7 reversed 7 remained 7 remain 7 related 7 refers 7 reference 7 recovered 7 rco2h 7 quantities 7 pvc 7 put 7 provides 7 producing 7 principle 7 portion 7 pink 7 penalise 7 pcl 7 patterns 7 pathway 7 passing 7 particle 7 our 7 orientation 7 organism 7 oils 7 observe 7 nucleon 7 “no 7 neon 7 nappies 7 mutation 7 mgoh2 7 methylbenzene 7 mendeleev 7 medicine 7 leucoindigo 7 length 7 layers 7 layer 7 kevlar 7 ironii 7 iodide 7 interaction 7 inhibition 7 incorrect 7 i– 7 however 7 ∆horeaction 7 ho2cco2h 7 hno3aq 7 highest 7 hi 7 helix 7 height 7 hbond 7 haq 7 happen 7 h2c 7 gasliquid 7 fragment 7 flow 7 flammable 7 flame 7 fe2aq 7 fairly 7 factors 7 evolution 7 ecell 7 dyes 7 dorbitals 7 dh 7 developed 7 derived 7 cyclic 7 crosslinked 7 cr2o72– 7 countries 7 corrosion 7 coordinate 7 come 7 cm 7 clouds 7 circuit 7 ciii 7 ch3och3 7 caused 7 cations 7 cas 7 candidate’s 7 c2h5oh 7 brønstedlowry 7 bridges 7 basicities 7 based 7 attracted 7 arrangement 7 anhydrous 7 analytical 7 already 7 aldehydes 7 al2o3s 7 agarose 7 against 7 adjacent 7 absorption 7 absence 7 9185 7 81br 7 79br 7 79 7 72 7 667 7 513 7 48 7 46 7 375 7 358 7 33 7 31 7 2n 7 –242 7 121 7 10°c 7 10–7 7 070 7 025 7 0020 6 worth 6 wide 6 washing 6 vegetable 6 valuable 6 val 6 upon 6 unreactive 6 tissue 6 thermoplastic 6 theory 6 temperatures 6 t½ 6 t✳ 6 ✉⑤t⑩ 6 student 6 streams 6 sting 6 starts 6 spot 6 spider 6 source 6 solute 6 soda 6 smallest 6 sioh4 6 siliconiv 6 shells 6 scl 6 scale 6 s✱✲✸✴✲ 6 r–s–s–r 6 roh 6 rigid 6 replication 6 replacement 6 repel 6 release 6 relationship 6 regular 6 rcocl 6 ♥❩❪q 6 pump 6 propylamine 6 promoted 6 precipitation 6 pot 6 polymerase 6 polyethene 6 pollution 6 pollutant 6 plotted 6 plot 6 platinum 6 plastics 6 placing 6 phosphoricv 6 petrol 6 peroxide 6 pcbs 6 pbso4 6 pbcl4 6 pbcl 6 particles 6 packed 6 operating 6 oh 6 octahedral 6 ococh3 6 numerical 6 now 6 nocl 6 niooh 6 ni2aq 6 nh2o 6 next 6 nas 6 nanotechnology 6 nanosphere 6 nanosized 6 naclaq 6 na2so4 6 n2g 6 move 6 motor 6 mother 6 mn 6 mirror 6 mgos 6 methane 6 mercury 6 measure 6 longer 6 little 6 leather 6 law 6 lack 6 kr 6 kohaq 6 kmno4aq 6 kinetic 6 ketones 6 kerosene 6 k2c2o4 6 industry 6 impure 6 i–aq 6 hydrophobic 6 hoch2ch2oh 6 hne 6 hn 6 hh 6 hexylamine 6 hess’ 6 heights 6 hbonding 6 h2so4aq 6 h2nchch2shco2h 6 good 6 generally 6 function 6 followed 6 few 6 feoh2 6 fec2o433– 6 fec2o4 6 fatty 6 father 6 fat 6 faraday 6 fades 6 external 6 expect 6 exactly 6 eqn 6 earth’s 6 ∆e 6 dust 6 drops 6 drawing 6 don’t 6 done 6 dm 3 6 disulphide 6 distribution 6 dissolving 6 discovered 6 dioxins 6 digestive 6 diapers 6 diameter 6 development 6 deposited 6 delocalisation 6 decomposes 6 dative 6 dark 6 cyclohexene 6 cuso4 6 cuprammonium 6 crystal 6 cross 6 cracked 6 cr 6 coplanar 6 configuration 6 commercial 6 combined 6 collisions 6 coch3 6 closer 6 children 6 chatelier’s 6 characteristic 6 ch3i 6 ch3co2na 6 ch3co 6 ch3chohco2h 6 ch3chohch3 6 ch2co2h 6 ch2cl 6 ch2chch2oh 6 central 6 ccl4 6 catalysts 6 cases 6 cars 6 carrying 6 candidates’ 6 ca2 6 c7h16 6 c6h5oh 6 c2h2o 6 butane 6 burnt 6 brown 6 brine 6 block 6 behaviour 6 bao 6 atmospheric 6 aspartic 6 asp 6 approximately 6 animal 6 amphoteric 6 alloys 6 allows 6 agno3aq 6 affects 6 adding 6 970104 6 81 6 74 6 65208 6 52 6 4nh3 6 46398 6 –460 6 433 6 410 6 –395 6 346 6 34 6 2x 6 2ethyl3methylbutanoic 6 2co2 6 263 6 26 6 24dnph 6 247 6 212 6 1s2 6 189 6 158 6 151 6 137 6 0352 6 03 6 0144 6 0096 6 001 6 …………………………………… 5 world 5 word 5 wool 5 wood 5 wish 5 who 5 whilst 5 weaker 5 volcanoes 5 vol 5 vanadium 5 urea 5 understanding 5 tyre 5 triple 5 today’s 5 tiniv 5 sufficient 5 straight 5 stirred 5 still 5 stabilities 5 stabilise 5 splitting 5 spin 5 spheres 5 speed 5 spectra 5 soaked 5 sncl2 5 slowest 5 silkworm 5 sif4 5 sic 5 sg 5 separated 5 se 5 scarce 5 scales 5 saving 5 salvage 5 s⑨ 5 ruh2o2cl 5 rows 5 resources 5 resource 5 research 5 require 5 reflect 5 rapid 5 radiation 5 ra 5 ✽r 5 quoted 5 powder 5 polymerised 5 play 5 plants 5 planar 5 pharmaceuticals 5 p4s10 5 operate 5 once 5 octet 5 och3 5 occurred 5 nrt 5 note 5 nonpolar 5 nonmetallic 5 ‘none’ 5 nitrogencontaining 5 nioh2 5 nhcl 5 ng 5 never 5 neither 5 nc 5 nanotube 5 mp 5 movements 5 mgcl2 5 methoxymethane 5 met 5 membrane 5 malachite 5 m1 5 location 5 listed 5 lioh 5 life 5 leaving 5 leadii 5 kpa 5 kjmol 5 isolated 5 involves 5 interest 5 insufficient 5 industrially 5 industrial 5 indicator 5 independent 5 increasingly 5 incoming 5 includes 5 ib13 5 ib12 5 hydrogenation 5 hydrogels 5 hydrides 5 hso4 5 hoch2ch2nh2 5 his 5 helical 5 hco3 5 hbonds 5 having 5 happens 5 halogens 5 halfequations 5 h2ni 5 global 5 geometry 5 genetic 5 fruit 5 fractional 5 forming 5 force 5 fluorinecontaining 5 flight 5 fizzes 5 fish 5 filled 5 feso4 5 fecl3 5 fats 5 fabrics 5 examiner 5 even 5 ethyne 5 ethanethiol 5 equ 5 enough 5 enable 5 electrolysed 5 dye 5 dried 5 dotandcross 5 distance 5 discharge 5 dil 5 diamond 5 diag 5 device 5 dehydrated 5 deduced 5 decreasing 5 decolourise 5 decide 5 davy 5 cyclopropane 5 cunh34h2o22 5 cucl2 5 crystals 5 crotonaldehyde 5 crco5pr3 5 controlled 5 context 5 container 5 consist 5 consider 5 confirm 5 configurations 5 concern 5 composed 5 component 5 combine 5 combination 5 coke 5 code 5 clear 5 clcl 5 cl• 5 changeheat 5 ch3nh2 5 ch3f 5 ch3chchch3 5 ch3ch2f 5 ch3ch2co2h 5 ch3ch2ch2nh2 5 catalytically 5 cano32 5 cambridge 5 calculators 5 c5h12o 5 c4h9oh 5 byproducts 5 but1ene 5 buildings 5 building 5 bridge 5 brick 5 brf3 5 birds 5 biochemical 5 bind 5 bii 5 balancing 5 average 5 attack 5 atomisation 5 astronomers 5 archaeology 5 approaches 5 antimony 5 anticancer 5 anions 5 angles 5 along 5 alkali 5 al2cl6 5 aiii 5 agno3 5 affinity 5 adenine 5 absorbs 5 absorbing 5 8h2o 5 8h 5 800 5 7h2o 5 70 5 600 5 57 5 5625 5 550 5 55 5 –394 5 37 5 362 5 3’ 5 2so2 5 2nacl 5 2mn2 5 2h2g 5 285 5 28 5 2400 5 233 5 2000 5 198 5 180 5 154 5 148 5 144 5 143 5 134 5 132 5 125 5 108 5 101 5 0600 5 054 5 0208 5 00294 5 ✱✲✳✱✷✳✱❈✲✱✴✳✲✷✳✷✱✺ 5 │ 4 ✁ ✝✄☎ ☛✝✁✟ ☛✏ 4 ✄✑☛☞✁ ☛✝✁✟ ✆ 4 ❯ ✁✂✄☎✆✁✝✞ 4 δt 4 β 4 α 4 zn2 4 zero 4 yes 4 yelloworangered 4 x2g 4 writings 4 whose 4 whence 4 ‘wasted’ 4 waq 4 volatilities 4 vmax 4 vital 4 via 4 –ve 4 ve 4 vary 4 variable 4 valency 4 unripe 4 unexpected 4 undergo 4 undecane 4 tube 4 t❀❁❂❀❃❄t❅❃❀ 4 ❸⑤③t⑩s❶⑨ 4 t②r③✉③t 4 triglycerides 4 treating 4 transformation 4 top 4 tool 4 today 4 ti 4 thymol 4 th 4 tetrahedral 4 testing 4 tell 4 taking 4 t❶✉③ 4 ❆❀t❇❀❀❈ 4 ❄❘❅❄t▲❝ 4 surrounded 4 sulfurcontaining 4 sulfates 4 successive 4 subshell 4 ⑧st②⑤tts❶⑨t 4 strontium 4 stored 4 storage 4 stations 4 statement 4 starch 4 st 4 s⑨⑧s②✈⑩③ 4 ③❺✈✉s⑨✈⑩s❶⑨❻ 4 ❽s⑩r 4 square 4 spread 4 soils 4 soil 4 so42– 4 so2aq 4 ‘sludge’ 4 skills 4 singly 4 sig 4 sidechain 4 si2cl 4 shw 4 showed 4 shift 4 shielded 4 shellhave 4 she 4 sf4 4 serine 4 separating 4 sep 4 sections 4 scripts 4 scores 4 salts 4 s8 4 s4n4 4 s2 4 s✚✑✧ 4 ✉③③⑩s⑨➀ 4 ✈⑦⑩③✇⑨✈⑩s➁③ 4 ruh2ococl 4 ❽rs②r 4 rshg 4 rs 4 roman 4 rich 4 ribosome 4 reversible 4 rest 4 resonance 4 represented 4 repeated 4 regions 4 region 4 referring 4 referred 4 refer 4 ref 4 reductant 4 recycling 4 recorded 4 reaction” 4 r–br 4 raised 4 radicals 4 ✱✵✶✶r✻ 4 ✳✵❤✴❭❑✷♣❵r❜❢♥❜♣✴✷✼❑❤❑✷ 4 ♠✴♥❜♣q♥❜ 4 pyruvic 4 pumice 4 ps 4 proposed 4 proportion 4 propenoate 4 propanoic 4 propane 4 problems 4 problem 4 predicted 4 precipitated 4 powdered 4 portions 4 polycarbonate 4 po 4 pno 4 pleated 4 places 4 phenyldiazonium 4 ph3 4 percentages 4 peptides 4 pentaerythritol 4 pbr2 4 passage 4 paracetamol 4 packaging 4 overcome 4 others 4 oral 4 oleic 4 –of– 4 occupied 4 oc 4 o2n 4 –o 4 nsn2 4 noticed 4 noh 4 ‘no 4 nna2co3 4 n≡n 4 nitrophenol 4 nitro 4 nitric 4 nitration 4 nhcoch3 4 nh3g 4 nh2conh2 4 nerve 4 near 4 nanospheres 4 nacn 4 na2co3xh2o 4 muscles 4 muscle 4 mrt 4 mother’s 4 molten 4 molesmolecules 4 molecularcovalent 4 mixtures 4 mill 4 milk 4 middle 4 mgh2 4 mgbr2 4 methoxybenzene 4 methanoate 4 mechanisms 4 measurement 4 meaning 4 match 4 mainly 4 magnitude 4 m4 4 look 4 liquids 4 liquefied 4 liposomes 4 liposome 4 leu 4 ldpe 4 largescale 4 labelling 4 key 4 kcl 4 k2cr2o7aq 4 joins 4 item 4 isotopic 4 ironiii 4 iodoform 4 involve 4 investigated 4 introduction 4 inside 4 insecticides 4 injected 4 impurities 4 implied 4 identities 4 hydrolyses 4 holding 4 hold 4 hoh 4 ho—c—c—oh 4 ho2cch2chohco2h 4 –hnchch2ohco– 4 –hnchch2co2hco– 4 –hnchch2ch2ch2ch2nh2co– 4 hg 4 heteropolymer 4 heaps 4 healthy 4 hdpe 4 hco2h 4 hard 4 halide 4 halflives 4 halflife 4 ha 4 h2sio3 4 h2nchch3co2h 4 h2nchch2ohco2h 4 h2nch2cho 4 h2co3 4 grids 4 greatest 4 great 4 goatskins 4 glycerol 4 glutamic 4 get 4 gently 4 generalisations 4 gels 4 gave 4 gaps 4 ga 4 furans 4 fruity 4 fourth 4 forensic 4 fluorine 4 flint 4 fingerprint 4 filtered 4 feh2o62 4 father’s 4 f3 4 extremely 4 extraction 4 extent 4 exposed 4 explanations 4 excessive 4 essential 4 equally 4 eocell 4 enzymecatalysed 4 enormous 4 ends 4 endpoint 4 electronreleasing 4 electronegative 4 electric 4 dxy 4 doubled 4 dorbital 4 distil 4 disruption 4 disproportionation 4 diseases 4 diluted 4 digestion 4 dichromatevi 4 diacid 4 di 4 devices 4 developments 4 determining 4 detect 4 design 4 describing 4 derivatives 4 derivative 4 depending 4 demonstrated 4 decolourised 4 decimal 4 decay 4 cxhy 4 currently 4 cunh34so4 4 cucl 4 crosslinks 4 cro3 4 crh2o3oh3 4 crco5 4 cr2 4 coulombs 4 cooling 4 conversion 4 consequence 4 conical 4 conditional 4 colours 4 coat 4 clch2cho 4 civ 4 circled 4 chart 4 chance 4 ch3cohcnch3 4 ch3coco2h 4 ch3chohch2oh 4 ch3ch2cocl 4 ch3ch2coch2ch3 4 ch3ch2chohch3 4 ch3ch2ch2ch2nh2 4 ch3ch2br 4 ch2o 4 ch2chco2h 4 ch2ch2 4 century 4 cco 4 ccl2 4 catalysing 4 carefully 4 carbocation 4 carbide 4 cao 4 came 4 caco3 4 ca2aq 4 c8h8o2 4 c5h12 4 c4h9br 4 c4h8o 4 c4h6o5 4 c3h7br 4 c3h6o2 4 c3h4o3 4 c2h5nh2 4 c2h5• 4 c11h24 4 but2ene 4 brch2co2h 4 brch2cho 4 bottle 4 blocks 4 biological 4 binds 4 biii 4 bicycle 4 baoh2 4 bands 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remove 3 relights 3 relies 3 relate 3 refrigerant 3 redorange 3 reaction’ 3 rbr 3 radii 3 ⑩r✈⑩ 3 quickly 3 purpleviolet 3 purity 3 purification 3 pungent 3 protonh 3 propellant 3 propanol 3 propan2ol 3 progressed 3 progress 3 prey 3 previously 3 prevents 3 preparation 3 pptsolid 3 potentials 3 possess 3 polypeptides 3 polymerisations 3 polyethylene 3 polarity 3 point’ 3 plotting 3 plant 3 photographic 3 phosphoric 3 pharmaceutical 3 peppermint 3 penalty 3 pc 3 pb4 3 parts 3 partially 3 ‘paper’ 3 pack 3 ozone 3 output 3 origin 3 orders 3 oppositely 3 omitted 3 ocell 3 nx 3 nucleophile 3 nuclei 3 nthio 3 nos 3 nog 3 ni2 3 –nh2 3 nfsw 3 neutralised 3 ncu2 3 ncl 3 nc4h9oh 3 nc4h9br 3 nanoparticle 3 nahso3 3 naf 3 naclo3 3 nabr 3 na2so3 3 n2h4l 3 mucous 3 ‘moderate’ 3 moderate 3 mobile 3 mibk 3 mgso4 3 melts 3 ‘melting 3 mechlorethamine 3 measurements 3 marked 3 marine 3 manganese 3 malonic 3 maintains 3 lungs 3 luggage 3 lowest 3 lost 3 linked 3 linear 3 limits 3 limewater 3 leaves 3 leach 3 kpc 3 kills 3 kiaq 3 kept 3 italics 3 ionises 3 ionicelectrovalent 3 involving 3 intestine 3 intervals 3 intensity 3 intended 3 instrumental 3 instantaneous 3 infrared 3 influenced 3 inflated 3 impossible 3 illustration 3 identifying 3 identification 3 idea 3 hydroxyl 3 hydrogens 3 ∆hsol 3 hooc 3 homopolymer 3 ∆hof 3 hoch2chohch2oh 3 hoch 3 ho2ccoco2h 3 ho2cchohchohco2h 3 h—o 3 ∆hfo 3 hfg 3 ∆hf 3 heptane 3 helpful 3 helium 3 heading 3 hco2chch32 3 hco2ch3 3 hclg 3 halides 3 guanine 3 growth 3 golf 3 going 3 go 3 glyceryl 3 glyalagly 3 glucose 3 glowing 3 giantmacro 3 german 3 gap 3 gain 3 future 3 frequency 3 formerly 3 follow 3 folded 3 fluorides 3 floats 3 find 3 fill 3 fig 3 fibres 3 feso4aq 3 fecl 3 feature 3 fatsoluble 3 falls 3 extracting 3 explosion 3 explicitly 3 expensive 3 examine 3 established 3 equivalent 3 equipment 3 eocellv 3 electrostaticionic 3 electronegativity 3 electrondonating 3 electrolytic 3 elaidic 3 eight 3 efficiency 3 effervescence 3 effectiveness 3 e330 3 drop 3 downstream 3 doses 3 donor 3 dmg 3 dm6 3 distributed 3 disrupts 3 disposal 3 disappears 3 direct 3 diffracted 3 dichlorodifluoromethane 3 dicarboxylic 3 diamine 3 detection 3 designed 3 descended 3 deposit 3 dependent 3 deoxyribose 3 delivered 3 deliver 3 deletion 3 dehydrogenase 3 definition 3 decreased 3 decompose 3 c  3 cytosine 3 cyclohexane 3 cycle 3 cyanide 3 cwsw 3 cuso4aq 3 cunh362 3 cu2  3 crystalline 3 crops 3 credit 3 created 3 cotton 3 cooking 3 converting 3 converters 3 converse 3 controlling 3 control 3 contrast 3 contaminated 3 constituent 3 consequences 3 conducts 3 ‘conductivity’ 3 concerns 3 complementary 3 complement 3 coming 3 cofactorprosthetic 3 closed 3 close 3 classified 3 cisplatin 3 circles 3 choice 3 chlorofluorocarbon 3 chlorination 3 chemicals 3 chargeproton 3 charged 3 changeenergy 3 ch3och3g 3 ch3co– 3 ch3chohcn 3 ch3ch2ch2ch3 3 ch3ch2ch2ch2ch2oh 3 ch3ch24coch3 3 ch3ch 3 ch2cn 3 ch2choh 3 –ch2– 3 c–f 3 centuries 3 cellulose 3 c≡c 3 cbr 3 causing 3 castlegar 3 casio3 3 carbons 3 carbonates 3 cancer 3 calorimeter 3 c6h5o 3 c6h10o5n 3 c4h8o2 3 c4h6o2 3 c4h10 3 c3h6 3 c2h5sh 3 c2h5br 3 c2h4o 3 c12h26 3 burn 3 bubbling 3 bromoalkane 3 brings 3 brief 3 brbr 3 bite 3 biomass 3 biodegrade 3 better 3 behind 3 bee 3 becoming 3 basicity 3 bano32 3 ba2 3 axis 3 associated 3 artificially 3 aromatic 3 aroma 3 arg 3 antiseptic 3 ancient 3 amine 3 alternatives 3 alkane 3 alkalioh 3 alaala 3 airliners 3 airliner 3 aii 3 ai 3 agbr 3 advantages 3 actual 3 acceptor 3 accepted 3 acceptable 3 abundant 3 abbreviations 3 994 3 99 3 98 3 –91 3 905 3 885 3 82  3 –82 3 710 3 71 3 6hcl 3 6h2og 3 69 3 650 3 610 3 61 3 5o2g 3 5o2 3 5n 3 5fe3 3 5fe2 3 566 3 562 3 551 3 506 3 4nog 3 4no2 3 4nh3g 3 4hydroxy2nonenal 3 4cl 3 4apea 3 4aminobenzoic 3 457 3 417 3 3o2 3 3hcl 3 392 3 39 3 38 3 35cl 3 335 3 312 3 2vo2 3 2p 3 2o7 3 2nd 3 2na 3 2mno4 3 2kcl 3 2i– 3 2hso4 3 2fecl3 3 2fecl2 3 2cuo 3 2cr3 3 2co 3 2c 3 2aq 3 299 3 294 3 293 3 286 3 278 3 275 3 262 3 24000 3 23dibromopropan1ol 3 2394 3 238u 3 2378tcdd 3 235 3 232th 3 232 3 226ra 3 226 3 213po 3 –201 3 2007 3 1st 3 1997 3 –1890 3 1890 3 187 3 –184 3 184 3 180° 3 173 3 170 3 165 3 156 3 150 3 14h 3 14dichlorobutane