| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | ||
| 1 | 1H hydrogen 1.008 |
2He helium 4.003 |
1 | ||||||||||||||||
| 2 | 3Li lithium 6.941 |
4Be beryllium 9.012 |
5B boron 10.81 |
6C carbon 12.01 |
7N nitrogen 14.01 |
8O oxygen 16.00 |
9F fluorine 19.00 |
10Ne neon 20.18 |
2 | ||||||||||
| 3 | 11Na sodium 22.99 |
12Mg magnesium 24.31 |
13Al aluminum 26.98 |
14Si silicon 28.09 |
15P phosphorus 30.97 |
16S sulfur 32.07 |
17Cl chlorine 35.45 |
18Ar argon 39.95 |
3 | ||||||||||
| 4 | 19K pottassium 39.10 |
20Ca calcium 40.08 |
21Sc scandium 44.96 |
22Ti titanium 47.88 |
23V vanadium 50.94 |
24Cr chromium 52.00 |
25Mn manganese 54.94 |
26Fe iron 55.85 |
27Co cobalt 58.93 |
28Ni nickel 58.69 |
29Cu copper 63.55 |
30Zn zinc 65.39 |
31Ga gallium 69.72 |
32Ge germanium 72.61 |
33As arsenic 74.92 |
34Se selenium 78.96 |
35Br bromine 79.90 |
36Kr krypton 83.80 |
4 |
| 5 | 37Rb rubidium 85.47 |
38Sr strontium 87.62 |
39Y yttrium 88.91 |
40Zr zirconium 91.22 |
41Nb niobium 92.91 |
42Mo molybdenum 95.94 |
43Tc technetium (99) |
44Ru ruthenium 101.1 |
45Rh rhodium 102.9 |
46Pd palladium 106.4 |
47Ag silver 107.9 |
48Cd cadmium 112.4 |
49In indium 114.8 |
50Sn tin 118.7 |
51Sb antimony 121.8 |
52Te tellurium 127.6 |
53I iodine 126.9 |
54Xe xenon 131.3 |
5 |
| 6 | 55Cs cesium 132.9 |
56Ba barium 137.3 |
57-71 lanthanoid |
72Hf hafnium 178.5 |
73Ta tantalum 180.9 |
74W tungsten 183.9 |
75Re rhenium 186.2 |
76Os osmium 190.2 |
77Ir iridium 192.2 |
78Pt platinum 195.1 |
79Au gold 197.0 |
80Hg mercury 200.6 |
81Tl thallium 204.4 |
82Pb lead 207.2 |
83Bi bismuth 209.0 |
84Po polonium (210) |
85At astatine (210) |
86Rn radon (222) |
6 |
| 7 | 87Fr francium (223) |
88Ra radium (226) |
89-103 actinoid |
| lanthanoid | 57La lanthanum 138.9 |
58Ce cerium 140.1 |
59Pr praseodymium 140.9 |
60Nd neodymium 144.2 |
61Pm promethium (145) |
62Sm samarium 150.4 |
63Eu europium 152.0 |
64Gd gadolinium 157.3 |
65Tb terbium 158.9 |
66Dy dysprosium 162.5 |
67Ho holmium 164.9 |
68Er erbium 167.3 |
69Tm thulium 168.9 |
70Yb ytterbium 173.0 |
71Lu lutetium 175.0 |
| actinoid | 89Ac actinium (227) |
90Th thorium 232.0 |
91Pa protactinium 231.0 |
92U uranium 238.0 |
93Np neptunium (237) |
94Pu plutonium (239) |
95Am americium (243) |
96Cm curium (247) |
97Bk berkelium (247) |
98Cf californium (252) |
99Es einsteinium (252) |
100Fm fermium (257) |
101Md mendelevium (256) |
102No nobelium (259) |
103Lr lawrencium (260) |