© UCLES 2016 21 20 19 9701/33/F/M/16 57–71 56 104 88 actinoids lanthanoids – – Ra radium Fr francium 90 89 232.0 thorium actinium – Th Ac 140.1 cerium 138.9 lanthanum 59 231.0 protactinium Pa 91 140.9 praseodymium Pr – 58 Ce – Db dubnium Rf 105 180.9 tantalum 73 Ta 92.9 niobium Nb 41 50.9 vanadium V 23 5 rutherfordium La 57 actinoids 89–103 178.5 87 137.3 hafnium 132.9 barium 72 Hf caesium lanthanoids Ba 55 91.2 zirconium Zr 40 47.9 titanium Ti 22 4 name 238.0 uranium U 92 144.4 neodymium 60 Nd – Sg seaborgium 106 183.8 tungsten 74 W 95.9 molybdenum Mo 42 52.0 Cr 24 6 chromium relative atomic mass atomic number Key atomic symbol Cs 88.9 yttrium 87.6 strontium rubidium 85.5 Sr Rb Y 39 38 45.0 37 40.1 scandium 39.1 calcium Ca potassium K Sc 3 24.3 magnesium 23.0 sodium 12 Mg Na 11 9.0 beryllium lithium 6.9 Be 4 3 Li 2 1 – neptunium Np 93 – promethium 61 Pm – Bh bohrium 107 186.2 rhenium 75 Re – technetium Tc 43 54.9 manganese Mn 25 7 9 10 11 12 B C N O 8 16 F 9 17 2 18 – plutonium Pu 94 150.4 samarium 62 Sm – Hs hassium 108 190.2 osmium 76 Os 101.1 ruthenium Ru 44 iron 55.8 Fe 26 8 1.0 – americium Am 95 152.0 europium 63 Eu – Mt meitnerium 109 iridium 192.2 Ir 77 102.9 rhodium Rh 45 58.9 cobalt Co 27 – curium Cm 96 157.3 gadolinium 64 Gd – Ds darmstadtium 110 195.1 platinum 78 Pt 106.4 palladium Pd 46 58.7 nickel Ni 28 – berkelium Bk 97 158.9 terbium 65 Tb – Rg roentgenium 111 gold 197.0 79 Au silver 107.9 Ag 47 63.5 copper Cu 29 – californium Cf 98 162.5 dysprosium 66 Dy – Cn copernicium 112 200.6 mercury 80 Hg 112.4 cadmium Cd 48 zinc 65.4 Zn 30 – einsteinium Es 99 164.9 holmium 67 Ho 204.4 thallium 81 Tl 114.8 indium In 49 69.7 gallium Ga 31 27.0 aluminium 13 Al 10.8 boron – fermium Fm 100 167.3 erbium 68 Er – Fl flerovium 114 lead 207.2 82 Pb tin 118.7 Sn 50 72.6 germanium Ge 32 28.1 silicon 14 Si 12.0 carbon – mendelevium Md 101 168.9 thulium 69 Tm 209.0 bismuth 83 Bi 121.8 antimony Sb 51 74.9 arsenic As 33 31.0 phosphorus P 15 14.0 nitrogen – nobelium No 102 173.1 ytterbium 70 Yb – Lv livermorium 116 – polonium 84 Po 127.6 tellurium Te 52 79.0 selenium Se 34 32.1 sulfur S 16 16.0 oxygen – Lr lawrencium 103 175.0 lutetium 71 Lu – astatine 85 At iodine 126.9 I 53 79.9 bromine Br 35 35.5 chlorine 17 Cl 19.0 fluorine – radon 86 Rn xenon 131.3 54 Xe 83.8 krypton 36 Kr 39.9 argon 18 Ar neon 20.2 10 Ne 4.0 helium 7 15 hydrogen 6 14 He 5 13 H 1 Group The Periodic Table of Elements 12 To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge International Examinations Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at www.cie.org.uk after the live examination series.