NUMBE R | SYMBOL | ELEMENT | VALENCE |
1 | H | Hydrogen | 1, 0, -1 |
2 | He | Helium | 0 |
3 | Li | Lithium | 1, -1 |
4 | Be | Beryllium | 2 |
5 | B | Boron | 3, 2, 1 |
6 | C | Carbon | 4, 3, 2, 1, -1, -2, -4 |
7 | N | Nitrogen | 5, 4, 3, 2, 1, 0, -1, -2, -3 |
8 | O | Oxygen | 2, 1, 0, -1, -2 |
9 | F | Fluorine | 0, -1 |
10 | Ne | Neon | 0 |
11 | Na | Sodium | 1, -1 |
12 | Mg | Magnesium | 2 |
13 | Al | Aluminum | 3, 1 |
14 | Si | Silicon | 4, 3, 2, 1, -1, -2, -4 |
15 | P | Phosphorus | 5, 4, 3, 2, 1, 0, -1, -2, -3 |
16 | S | Sulfur | 6, 5, 4, 3, 2, 1, 0, -1, -2 |
17 | Cl | Chlorine | 6, 5, 4, 3, 2, 1, 0, -1, -2 |
18 | Ar | Argon | 0 |
19 | K | Potassium | 1, -1 |
20 | Ca | Calcium | 2 |
21 | Sc | Scandium | 3, 2, 1 |
22 | Ti | Titanium | 4, 3, 2, 0, -1, -2 |
23 | V | Vanadium | 5, 4, 3, 2, 1, 0, -1, -2 |
24 | Cr | Chromium | 6, 5, 4, 3, 2, 1, 0, -1, -2, -3, -4 |
25 | Mn | Manganese | 7, 6, 5, 4, 3, 2, 1, 0, -1, -2, -3 |
26 | Fe | Iron | 6, 5, 4, 3, 2, 1, 0, -1, -2 |
27 | Co | Cobalt | 5, 4, 3, 2, 1, 0, -1 |
28 | Ni | Nickel | 6, 4, 3, 2, 1, 0, -1 |
29 | Cu | Copper | 4, 3, 2, 1, 0 |
30 | Zn | Zinc | 2, 1, 0 |
31 | Ga | Gallium | 3, 2, 1 |
32 | Ge | Germanium | 4, 3, 2, 1 |
33 | As | Arsenic | 5, 3, 2, -3 |
34 | Se | Selenium | 6, 4, 2, 1, -2 |
35 | Br | Bromine | 7, 5, 4, 3, 1, 0, -1 |
36 | Kr | Krypton | 2, 0 |
37 | Rb | Rubidium | 1, -1 |
38 | Sr | Strontium | 2 |
39 | Y | Yttrium | 3, 2 |
40 | Zr | Zirconium | 4, 3, 2, 1, 0, -2 |
41 | Nb | Niobium | 5, 4, 3, 2, 1, 0, -1, -3 |
42 | Mo | Molybdenum | 6, 5, 4, 3, 2, 1, 0, -1, -2 |
43 | Tc | Technetium | 7, 6, 5, 4, 3, 2, 1, 0, -1, -3 |
44 | Ru | Ruthenium | 8, 7, 6, 5, 4, 3, 2, 1, 0, -2 |
45 | Rh | Rhodium | 6, 5, 4, 3, 2, 1, 0, -1 |
46 | Pd | Palladium | 4, 2, 0 |
47 | Ag | Silver | 3, 2, 1, 0 |
48 | Cd | Cadmium | 2, 1 |
49 | In | Indium | 3, 2, 1 |
50 | Sn | Tin | 4, 2, -4 |
51 | Sb | Antimony | 5, 3, -3 |
52 | Te | Tellurium | 6, 5, 4, 2, 1, -2 |
53 | I | Iodine | 7, 5, 3, 1, 0, -1 |
54 | Xe | Xenon | 8, 6, 4, 3, 2, 0 |
55 | Cs | Cesium | 1, -1 |
56 | Ba | Barium | 2 |
57 | La | Lanthanum | 3, 2 |
58 | Ce | Cerium | 4, 3, 2 |
59 | Pr | Praseodymium | 4, 3, 2 |
60 | Nd | Neodymium | 4, 3, 2 |
61 | Pm | Promethium | 3 |
62 | Sm | Samarium | 3, 2 |
63 | Eu | Europium | 3, 2 |
64 | Gd | Gadolinium | 3, 2, 1 |
65 | Tb | Terbium | 4, 3, 1 |
66 | Dy | Dysprosium | 4, 3, 2 |
67 | Ho | Holmium | 3, 2 |
68 | Er | Erbium | 3 |
69 | Tm | Thulium | 3, 2 |
70 | Yb | Ytterbium | 3, 2 |
71 | Lu | Lutetium | 3 |
72 | Hf | Hafnium | 4, 3, 2, 1 |
73 | Ta | Tantalum | 5, 4, 3, 2, 1, -1, -3 |
74 | W | Tungsten | 6, 5, 4, 3, 2, 1, 0, -1, -2, -4 |
75 | Re | Rhenium | 7, 6, 5, 4, 3, 2, 1, 0, -1, -3 |
76 | Os | Osmium | 8, 7, 6, 5, 4, 3, 2, 1, 0, -2 |
77 | Ir | Iridium | 6, 5, 4, 3, 2, 1, 0, -1 |
78 | Pt | Platinum | 6, 5, 4, 2, 0 |
79 | Au | Gold | 7, 5, 3, 2, 1, 0, -1 |
80 | Hg | Mercury | 2, 1 |
81 | Tl | Thallium | 3, 1 |
82 | Pb | Lead | 4, 2 |
83 | Bi | Bismuth | 5, 3, 1, -3 |
84 | Po | Polonium | 6, 4, 2, -2 |
85 | At | Astatine | 7, 5, 3, 1, -1 |
86 | Rn | Radon | 2, 0 |
87 | Fr | Francium | 1 |
88 | Ra | Radium | 2 |
89 | Ac | Actinium | 3 |
90 | Th | Thorium | 4, 3, 2 |
91 | Pa | Protactinium | 5, 4, 3 |
92 | U | Uranium | 6, 5, 4, 3, 2 |
93 | Np | Neptunium | 7, 6, 5, 4, 3, 2 |
94 | Pu | Plutonium | 7, 6, 5, 4, 3, 2 |
95 | Am | Americium | 7, 6, 5, 4, 3, 2 |
96 | Cm | Curium | 6, 5, 4, 3, 2 |
97 | Bk | Berkelium | 4, 3, 2 |
98 | Cf | Californium | 5, 4, 3, 2 |
99 | Es | Einsteinium | 4, 3, 2 |
100 | Fm | Fermium | 4, 3, 2 |
101 | Md | Mendelevium | 3, 2, 1 |
102 | No | Nobelium | 3, 2 |
103 | Lr | Lawrencium | 3, 2 |
104 | Rf | Rutherfordium | 4, 3 |
105 | Db | Dubnium | 5, 4 |
106 | Sg | Seaborgium | 6, 5, 4 |
107 | Bh | Bohrium | 7, 6, 5, 4, 3 |
108 | Hs | Hassium | 8, 7, 4, 3, 2 |
109 | Mt | Meitnerium | 6, 5, 4, 3, 2, 1 |
110 | Ds | Darmstadtium | 6, 5, 4, 3, 2, 1 |
111 | Rg | Roentgenium | 3, -1 |
112 | Cn | Copernicium | 2, 1 |
113 | Nh | Nihonium | 1 |
114 | Fl | Flerovium | 2 |
115 | Mc | Moscovium | 3, 1 |
116 | Lv | Livermorium | 4, 2 |
117 | Ts | Tennessine | unknown |
118 | Og | Oganesson | 8, 6, 4, 2 |