Symbol Element Proton no. R.A.M Group Electron no. Electron shells Metal, non-metal etc.
H Hydrogen 1 1 1 1 1 hydrogen
He Helium 2 4 18 2 2 noble gas
Li Lithium 3 7 1 3 2.1 alkali metal
Be Beryllium 4 9 2 4 2.2 alkaline-earth metal
B Boron 5 11 13 5 2.3 semimetal
C Carbon 6 12 14 6 2.4 non-metal
N Nitrogen 7 14 15 7 2.5 non-metal
O Oxygen 8 16 16 8 2.6 non-metal
F Fluorine 9 19 17 9 2.7 halogen
Ne Neon 10 20 18 10 2.8 noble gas
Na Sodium 11 23 1 11 2.8.1 alkali metal
Mg Magnesium 12 24 2 12 2.8.2 alkaline-earth metal
Al Aluminium 13 27 13 13 2.8.3 poor metal
Si Silicon 14 28 14 14 2.8.4 semimetal
P Phosphorus 15 31 15 15 2.8.5 non-metal
S Sulphur 16 32 16 16 2.8.6 non-metal
Cl Chlorine 17 36 17 17 2.8.7 halogen
Ar Argon 18 40 18 18 2.8.8 noble gas
K Potassium 19 39 1 19 2.8.8.1 alkali metal
Ca Calcium 20 40 2 20 2.8.8.2 alkaline-earth metal
Sc Scandium 21 45 3 21 2.8.9.2 transition metal
Ti Titanium 22 48 4 22 2.8.10.2 transition metal
V Vanadium 23 51 5 23 2.8.11.2 transition metal
Cr Chromium 24 52 6 24 2.8.13.1 transition metal
Mn Manganese 25 55 7 25 2.8.13.2 transition metal
Fe Iron 26 56 8 26 2.8.14.2 transition metal
Co Cobalt 27 59 9 27 2.8.15.2 transition metal
Ni Nickel 28 59 10 28 2.8.16.2 transition metal
Cu Copper 29 63.5 11 29 2.8.18.1 transition metal
Zn Zinc 30 65 12 30 2.8.18.2 transition metal
Ga Gallium 31 70 13 31 2.8.18.3 poor metal
Ge Germanium 32 73 14 32 2.8.18.4 semimetal
As Arsenic 33 75 15 33 2.8.18.5 semimetal
Se Selenium 34 79 16 34 2.8.18.6 semimetal
Br Bromine 35 80 17 35 2.8.18.7 halogen
Kr Krypton 36 83 18 36 2.8.18.8 noble gas
Rb Rubidium 37 85 1 37 2.8.18.8.1 alkali metal
Sr Strontium 38 88 2 38 2.8.18.8.2 alkaline-earth metal
Y Yttrium 39 89 3 39 2.8.18.9.2 transition metal
Zr Zirconium 40 91 4 40 2.8.18.10.2 transition metal
Nb Niobium 41 93 5 41 2.8.18.12.1 transition metal
Mo Molybdenum 42 96 6 42 2.8.18.13.1 transition metal
Tc Technetium 43 99 7 43 2.8.18.14.1 transition metal
Ru Ruthenium 44 101 8 44 2.8.18.15.1 transition metal
Rh Rhodium 45 103 9 45 2.8.18.16.1 transition metal
Pd Palladium 46 106 10 46 2.8.18.18 transition metal
Ag Silver 47 108 11 47 2.8.18.18.1 transition metal
Cd Cadmium 48 112 12 48 2.8.18.18.2 transition metal
In Indium 49 115 13 49 2.8.18.18.3 poor metal
Sn Tin 50 119 14 50 2.8.18.18.4 poor metal
Sb Antimony 51 122 15 51 2.8.18.18.5 semimetal
Te Tellurium 52 128 16 52 2.8.18.18.6 semimetal
I Iodine 53 127 17 53 2.8.18.18.7 halogen
Xe Xenon 54 131 18 54 2.8.18.18.8 noble gas
Cs Caesium 55 133 1 55 2.8.18.18.8.1 alkali metal
Ba Barium 56 137 2 56 2.8.18.18.8.2 alkaline-earth metal
La Lanthanum 57 139 3 57 2.8.18.18.9.2 lanthanide
Ce Cerium 58 140 24 58 2.8.18.19.9.2 lanthanide
Pr Praseodymium 59 141 25 59 2.8.18.21.8.2 lanthanide
Nd Neodymium 60 144 26 60 2.8.18.22.8.2 lanthanide
Pm Promethium 61 147 27 61 2.8.18.23.8.2 lanthanide
Sm Samarium 62 150 28 62 2.8.18.24.8.2 lanthanide
Eu Europium 63 152 29 63 2.8.18.25.8.2 lanthanide
Gd Gadolinium 64 157 30 64 2.8.18.26.8.2 lanthanide
Tb Terbium 65 159 31 65 2.8.18.27.8.2 lanthanide
Dy Dysprosium 66 163 32 66 2.8.18.28.8.2 lanthanide
Ho Holmium 67 165 33 67 2.8.18.29.8.2 lanthanide
Er Erbium 68 167 34 68 2.8.18.30.8.2 lanthanide
Tm Thulium 69 169 35 69 2.8.18.31.8.2 lanthanide
Yb Ytterbium 70 173 36 70 2.8.18.32.8.2 lanthanide
Lu Lutetium 71 175 37 71 2.8.18.32.9.2 lanthanide
Hf Hafnium 72 178 4 72 2.8.18.32.10.2 transition metal
Ta Tantalum 73 181 5 73 2.8.18.32.11.2 transition metal
W Tungsten 74 184 6 74 2.8.18.32.12.2 transition metal
Re Rhenium 75 186 7 75 2.8.18.32.13.2 transition metal
Os Osmium 76 190 8 76 2.8.18.32.14.2 transition metal
Ir Iridium 77 192 9 77 2.8.18.32.15.2 transition metal
Pt Platinum 78 195 10 78 2.8.18.32.17.1 transition metal
Au Gold 79 197 11 79 2.8.18.32.18.1 transition metal
Hg Mercury 80 201 12 80 2.8.18.32.18.2 transition metal
Tl Thallium 81 204 13 81 2.8.18.32.18.3 poor metal
Pb Lead 82 207 14 82 2.8.18.32.18.4 poor metal
Bi Bismuth 83 209 15 83 2.8.18.32.18.5 poor metal
Po Polonium 84 210 16 84 2.8.18.32.18.6 poor metal
At Astatine 85 210 17 85 2.8.18.32.18.7 halogen
Rn Radon 86 222 18 86 2.8.18.32.18.8 noble gas
Fr Francium 87 223 1 87 2.8.18.32.18.8.1 alkali metal
Ra Radium 88 226 2 88 2.8.18.32.18.8.2 alkaline-earth metal
Ac Actinium 89 224 3 89 2.8.18.32.18.9.2 actinide
Th Thorium 90 232 24 90 2.8.18.32.18.10.2 actinide
Pa Protactinium 91 231 25 91 2.8.18.32.20.9.2 actinide
U Uranium 92 238 26 92 2.8.18.32.21.9.2 actinide
Np Neptunium 93 237 27 93 2.8.18.32.22.9.2 actinide
Pu Plutonium 94 239 28 94 2.8.18.32.24.8.2 actinide
Am Americium 95 241 29 95 2.8.18.32.25.8.2 actinide
Cm Curium 96 247 30 96 2.8.18.32.25.9.2 actinide
Bk Berkelium 97 249 31 97 2.8.18.32.27.8.2 actinide
Cf Californium 98 251 32 98 2.8.18.32.28.8.2 actinide
Es Einsteinium 99 254 33 99 2.8.18.32.29.8.2 actinide
Fm Fermium 100 257 34 100 2.8.18.32.30.8.2 actinide
Md Mendelevium 101 258 35 101 2.8.18.32.31.8.2 actinide
No Nobelium 102 255 36 102 2.8.18.32.32.8.2 actinide
Lr Lawrencium 103 262 37 103 2.8.18.32.32.9.2 actinide
Rf Rutherfordium 104 261 4 104 2.8.18.32.32.10.2 transition metal
Db Dubnium 105 262 5 105 2.8.18.32.32.11.2 transition metal
Sg Seaborgium 106 263 6 106 2.8.18.32.32.12.2 transition metal
Bh Bohrium 107 262 7 107 2.8.18.32.32.13.2 transition metal
Hs Hassium 108 265 8 108 2.8.18.32.32.14.2 transition metal
Mt Meitnerium 109 266 9 109 2.8.18.32.32.15.2 transition metal
Uun Ununnilium 110 unknown 10 110 2.8.18.32.32.17.1 transition metal
Uuu Unununium 111 unknown 11 111 2.8.18.32.32.18.1 transition metal
Uub Ununbium 112 unknown 12 112 2.8.18.32.32.18.2 transition metal
Uut Ununtrium 113 unknown 13 113 2.8.18.32.32.18.3 poor metal
Uuq Ununquadium 114 unknown 14 114 2.8.18.32.32.18.4 poor metal
    115 unknown 15 115 2.8.18.32.32.18.5 poor metal
Uuh Ununhexium 116 unknown 16 116 2.8.18.32.32.18.6 poor metal
Uus Ununseptium 117 unknown 17 117 2.8.18.32.32.18.7 halogen
Uuo Ununoctium 118 unknown 18 118 2.8.18.32.32.18.8 noble gas