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| 1 | 2 | Group | 3 | 4 | 5 | 6 | 7 | 0 | ||||||||||
| Period | ||||||||||||||||||
| 1 |
1 H Hydrogen 1 |
KEY |
2 He Helium 4.0 |
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| 2 |
3 Li Lithium 7 |
4 Be Beryllium 9 |
Atomic Number Symbol Name Relative atomic mass |
5
B Boron 10.8 |
6 C Carbon 12.0 |
7 N Nitrogen 14.0 |
8 O Oxygen 16.0 |
9 F Fluorine 19.0 |
10 Ne Neon 20.2 |
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| 3 |
11
Na Sodium 23 |
12
Mg Magnesium 24 |
13 Al Aluminium 27.0 |
14 Si Silicon 28.1 |
15 P Phosphrous 31.0 |
16 S Sulphorus 32.1 |
17 Cl Chlorine 35.5 |
18 Ar Argon 39.9 |
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| 4 |
19 K Potassium 39 |
20 Ca Calcium 40 |
21 Sc Scandium 45 |
22 Ti Titanium 47.9 |
23 V Vanadium 50.9 |
24 Cr Chromium 52.0 |
25 Mn Manganese 54.9 |
26 Fe Iron 55.9 |
27 Co Cobalt 58.9 |
28 Ni Nickel 58.7 |
29 Cu Copper 63.5 |
30 Zn Zinc 65.4 |
31 Ga Gallium 69.7 |
32 Ge Germanium 72,6 |
33 As Arsenic 74.9 |
34 Se Selenium 79.0 |
35 Br Bromine 79.9 |
36 Kr Krypton 83.8 |
| 5 |
37 Rb Rubidium 85 |
38 Sr Stronium 88 |
39 Y Yitrium 88.9 |
40 Zr Zirconium 91.2 |
41 Nb Niobium 92.9 |
42 Mo Molybdenum 95.9 |
43 Tc Technetium 99 |
44 Ru Ruthenium 101.1 |
45 Rh Rhodium 102.9 |
46 Pd Palladium 106.4 |
47 Ag Silver 107.9 |
48 Cd Cadmium 112.4 |
49 In Indium 114.8 |
50 Sn Tin 118.7 |
51 Sb Antimony 121.8 |
52 Te Tellurium 127.6 |
53 I Iodine 126.9 |
54 Xe Xenon 131.3 |
| 6 |
55 Cs Caesium 133 |
56 Ba Barium 137 |
57 * La Lanthanum 138.9 |
72 Hf Hafnium 178.5 |
73 Ta Tantalum 181.0 |
74 W Tungsten 183.9 |
75 Re Rhenium 186.2 |
76 Os Osmium 190.2 |
77 Ir iridium 192.2 |
78 Pt Platinum 195.1 |
79 Au Gold 197.0 |
80 Hg Mercury 200.6 |
81 TI Thallium 204.4 |
82 Pb Lead 207.2 |
83 Bi Bismuth 209.0 |
84 Po Polonium 210 |
85 At Astatine 210 |
86 Rn Radon 222 |
| 7 |
87 Fr Francium 223 |
88 Ra Radium 226 |
89 * * Ac Actinium 227 |
104 Db Dubnium 261 |
105 JI Joliotium 262 |
106 Rf Ruther-fordium 263 |
107 Bh Bohrium |
108 Hn Hahaium |
109 Mt meiterium |
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| Lantha-noid elements * |
58 Ce Cerium 140.1 |
59 Pr Praseo-dymium 141 |
60 Nd Neodymium 144.2 |
61 Pm Promethium 147 |
62 Sm Samarium 150.4 |
63 Eu Europium 152.0 |
64 Gd Gadolinium 157.3 |
65 Tb Terbium 158.9 |
66 Dy Dysprosium 162.5 |
67 Ho Holmium 164.9 |
68 Er Erbium 167.3 |
69 Tm Thulium 168.9 |
70 Yb Ytterbium 173.0 |
71 Lu Lutetium 175.0 |
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| Actinoid elements ** |
90 Th Thorium 232.0 |
91 Pa Protactinium 231 |
92 U Uranium 238.1 |
93 Np Neptunium 237 |
94 Pu Plutonium 242 |
95 Am Americium 243 |
96 Cm Cunum 247 |
97 Bk Berkelium 245 |
98
Cf Califronium 251 |
99 Es Einsteinium 254 |
100 Fm Fermium 253 |
101 Md Mendelevium 256 |
102 No Nobelium 254 |
103 Lr Lawrencium 257 |
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