The Periodic Table of Elements I Cambridge IGCSE® Group II III name Li 4 Be 1 alkali metals halogens alkaline earth metals noble gases beryllium 9 transition metals lanthanoids 11 12 other metals actinoids non-metals unclassified Na Mg sodium magnesium 19 20 23 K Ca Sc 22 Ti 23 V 24 Cr 25 41 42 43 Sr rubidium strontium 55 56 85 Cs 88 Ba caesium barium 87 88 133 Fr francium – Y yttrium 89 57–71 lanthanoids 137 Ra radium Zr Nb actinoids – – 108 palladium 72 73 74 75 76 77 78 93 Hf 34 35 Ta 96 W – Re 101 Os 103 Ir 48 Cd bromine krypton 49 50 51 52 53 54 73 In Sn 80 75 Sb 79 Te 80 Xe 127 131 115 119 antimony tellurium iodine 81 82 83 84 85 Tl Pb 122 Bi 128 Po – – osmium iridium platinum 195 197 gold mercury thallium 204 207 lead bismuth polonium astatine 104 105 106 107 108 109 110 111 112 113 114 115 116 117 Rf Db Sg Bh 190 Hs 192 Mt Ds Rg 201 Cn Nh Fl 209 Mc – Lv Ts rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium copernicium nihonium flerovium moscovium livermorium tennessine 58 59 60 61 62 63 64 65 66 67 68 69 70 71 – Pr – Nd – Pm – Sm – Eu – Gd – Tb – Dy – Ho – Er Tm 167 169 cerium praseodymium neodymium promethium samarium europium gadolinium terbium dysprosium holmium erbium 90 91 92 93 94 95 96 97 98 99 100 Th thorium 232 141 Pa protactinium 231 144 U uranium 238 – Np neptunium – 150 Pu plutonium – 152 Am Cm – – americium The volume of one mole of any gas is 24 dm3 at room temperature and pressure (r.t.p.) ® IGCSE is a registered trademark. Copyright © UCLES 2017 157 curium 159 Bk berkelium – 163 Cf californium – 165 Es einsteinium – – Fm fermium – – Yb – Lu thulium ytterbium lutetium 101 102 103 Md mendelevium – 173 No nobelium – 86 Rn rhenium 186 xenon At tungsten 184 84 I tin tantalum 181 Kr selenium 79 Hg Br arsenic indium Au Se 36 germanium cadmium Pt As argon gallium silver 112 Ge 32 hafnium 140 Ac 106 rhodium 139 actinium Ag ruthenium 91 47 Pd technetium Ce 89 Rh molybdenum La lanthanum Ru 46 niobium – 57 Tc 45 zirconium 178 89–103 Mo 44 40 33 70 40 35.5 32 31 18 Ar 31 28 neon Cl chlorine 65 39 S sulfur 64 38 20 phosphorus 59 zinc P 16 silicon 59 copper Si 14 aluminium 56 nickel 19 17 55 37 52 cobalt Ne 16 12 10 F 15 Ga iron O 9 14 Zn manganese N 8 13 Al 30 C 7 fluorine Cu chromium 51 29 6 oxygen Ni vanadium 48 28 4 nitrogen Co titanium 45 27 helium carbon 11 Fe scandium 40 26 VIII He boron Mn calcium Rb B Recently discovered elements (113–118) only exist for fractions of a second, and only a few atoms of each have ever been made. Consequently, they are not yet classified as metals or non-metals. 27 21 VII non-metals 5 24 potassium 39 metals hydrogen lithium 7 VI 2 H atomic symbol relative atomic mass 3 V 1 atomic number Key IV 175 Lr lawrencium – radon 118 Og oganesson –