© UCLES 2020 12 Sc Ti V Cr Mn Co 27 Ni 28 Cu 29 Zn 30 5070/01/SP/23 104 88 – 90 89 232 thorium actinium – Th Ac 140 cerium 139 lanthanum 59 231 protactinium Pa 91 141 praseodymium Pr – 58 Ce – Db dubnium Rf rutherfordium La 57 actinoids 105 181 tantalum Ta 73 93 Nb niobium 41 51 vanadium 238 uranium U 92 144 neodymium 60 Nd – Sg seaborgium 106 184 tungsten W 74 96 Mo molybdenum 42 52 chromium – neptunium Np 93 – promethium 61 Pm – Bh bohrium 107 186 rhenium Re 75 – Tc technetium 43 55 manganese Fe – plutonium Pu 94 150 samarium 62 Sm – Hs hassium 108 190 osmium Os 76 101 Ru ruthenium 44 56 iron – americium Am 95 152 europium 63 Eu – Mt meitnerium 109 192 iridium Ir 77 103 Rh rhodium 45 59 cobalt – curium Cm 96 157 gadolinium 64 Gd – Ds darmstadtium 110 195 platinum Pt 78 106 Pd palladium 46 59 nickel The volume of one mole of any gas is 24 dm3 at room temperature and pressure (r.t.p.). actinoids lanthanoids – Ra radium Fr francium 89–103 178 87 137 hafnium 133 barium Hf caesium lanthanoids Ba 72 91 Zr zirconium 40 48 titanium Cs 89 57–71 88 56 85 55 Y yttrium Sr strontium 39 45 Rb 38 40 Ca rubidium 37 39 K scandium – berkelium Bk 97 159 terbium 65 Tb – Rg roentgenium 111 gold 197 Au 79 108 silver Ag 47 64 copper – californium Cf 98 163 dysprosium 66 Dy – Cn copernicium 112 201 mercury Hg 80 112 Cd cadmium 48 65 zinc calcium 26 potassium 25 31 24 – einsteinium Es 99 165 holmium 67 Ho – Nh nihonium 113 204 thallium Tl 81 115 In indium 49 70 gallium Ga 27 20 24 19 23 aluminium Al 13 11 boron magnesium 23 1 sodium 22 B C N 7 O 8 VI F 9 VII 2 VIII – fermium Fm 100 167 erbium 68 Er – Fl flerovium 114 lead 207 Pb 82 119 tin Sn 50 73 Ge germanium 32 28 silicon Si 14 12 carbon – mendelevium Md 101 169 thulium 69 Tm – Mc moscovium 115 209 bismuth Bi 83 122 Sb antimony 51 75 As arsenic 33 31 phosphorus P 15 14 nitrogen – nobelium No 102 173 ytterbium 70 Yb – Lv livermorium 116 – polonium Po 84 128 Te tellurium 52 79 Se selenium 34 32 sulfur S 16 16 oxygen – Lr lawrencium 103 175 lutetium 71 Lu – Ts tennessine 117 – astatine At 85 127 I iodine 53 80 Br bromine 35 35.5 chlorine Cl 17 19 fluorine – oganesson Og – 118 radon 86 Rn 131 Xe xenon 54 84 Kr krypton 36 40 argon 18 Ar 20 neon Ne 10 4 helium 6 V hydrogen 5 IV He Mg 21 relative atomic mass name atomic symbol atomic number Key III H 1 Na 9 11 7 Be beryllium Li 4 3 lithium II I Group The Periodic Table of Elements 17