| Group | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Period | |||||||||||||||||||
| 1 | 1 H Hydrogen |
2 He Helium | |||||||||||||||||
| 2 | 3 Li Lithium |
4 Be Beryllium |
5 B Boron |
6 C Carbon |
7 N Nitrogen |
8 O Oxygen |
9 F Fluorine |
10 Ne Neon |
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| 3 | 11 Na Sodium |
12 Mg Magnesium |
13 Al Aluminium |
14 Si Silicon |
15 P Phosphorus |
16 S Sulphur |
17 Cl Chlorine |
18 Ar Argon |
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| 4 | 19 K Pottasium |
20 Ca Calcium |
21 Sc Scandium |
22 Ti Titanium |
23 V Vanadium |
24 Cr Chromium |
25 Mn Manganese |
26 Fe Iron |
27 Co Cobalt |
28 Ni Nickel |
29 Cu Copper |
30 Zn Zinc |
31 Ga Gallium |
32 Ge Germanium |
33 As Arsenic |
34 Se Selenium |
35 Br Bromine |
36 Kr Krypton |
|
| 5 | 37 Rb Rubidium |
38 Sr Strontium |
39 Y Yttrium |
40 Zr Zirconium |
41 Nb Niobium |
42 Mo Molybdenum |
43 Tc Technetium |
44 Ru Ruthenium |
45 Rh Rhodium |
46 Pd Palladium |
47 Ag Silver |
48 Cd Cadmium |
49 In Indium |
50 Sn Tin |
51 Sb Antimony |
52 Te Tellurium |
53 I Iodine |
54 Xe Xenon |
|
| 6 | 55 Cs Cesium |
56 Ba Barium |
* | 71 Lu Lutetium |
72 Hf Hafnium |
73 Ta Tantalum |
74 W Tungsten |
75 Re Rhenium |
76 Os Osmium |
77 Ir Iridium |
78 Pt Platinum |
79 Au Gold |
80 Hg Mercury |
81 Ti Thallium |
82 Pb Lead |
83 Bi Bismuth |
84 Po Polonium |
85 At Astatine |
86 Rn Radon |
| 7 | 87 Fr Francium |
88 Ra Radium |
** | 103 Lr Lawrencium |
104 Rf Rutherfordium |
105 Db Dubnium |
106 Sg Seaborgium |
107 Bh Bohrium |
108 Hs Hassium |
109 Mt Meitnerium |
110 Ds Darmstadtium |
111 Rg Roentgenium |
112 Uub Ununbium |
113 Uut Ununtrium |
114 Uuq Ununquadium |
115 Uup Ununpentium |
116 Uuh Ununhexium |
117 Uus Ununseptium |
118 UUo Ununoctium |
| * Lanthanoids | 57 La Lanthanum |
58 Ce Cerium |
59 Pr Praseodymium |
60 Nd Neodymium |
61 Pm Promethium |
62 Sm Samarium |
63 Eu Europium |
64 Gd Gadolinium |
65 Tb Terbium |
66 Dy Dysprosium |
67 Ho Holmium |
68 Er Erbium |
69 Tm Thulium |
70 Yb Ytterbium |
|||||
| ** Actinoids | 89 Ac Actinium |
90 Th Thorium |
91 Pa Protactinium |
92 U Uranium |
93 Np Neptunium |
94 Pu Plutonium |
95 Am Americium |
96 Cm Curium |
97 Bk Berkelium |
98 Cf Californium |
99 Es Einsteinium |
100 Fm Fermium |
101 Md Mendelevium |
102 No Nobelium |
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Note: Elements 113, 115, and 117 are not known, but are included in the table to show their expected positions. Elements 114, 116, and 118 have only been reported recently.
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