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