Valency (Chemistry)

 

Atomic number		Name of element		Valency
1		Hydrogen		1
2		Helium		0
3		Lithium		1
4		Beryllium		2
5		Boron		3
6		Carbon		2, 4
7		Nitrogen		3, 5
8		Oxygen		2
9		Fluorine		1
10		Neon		0
11		Sodium		1
12		Magnesium		2
13		Aluminium		3
14		Silicon		4
15		Phosphorus		3, 5
16		Sulfur		2, 4, 6
17		Chlorine		1, 3, 5, 7
18		Argon		0
19		Potassium		1
20		Calcium		3, 5
21		Scandium		3
22		Titanium		3, 4
23		Vanadium		2, 3, 4, 5
24		Chromium		2, 3, 6
25		Manganese		2, 3, 4, 6, 7
26		Iron		2, 3
27		Cobalt		2, 3
28		Nickel		2, 3
29		Copper		1, 2
30		Zinc		2
31		Gallium		2, 3
32		Germanium		4
33		Arsenic		3, 5
34		Selenium		2, 4, 6
35		Bromine		1, 3, 5, 7
36		Krypton		0
37		Rubidium		1
38		Strontium		2
39		Yttrium		3
40		Zirconium		4
41		Niobium		3, 5
42		Molybdenum		2, 3, 4, 5, 6
43		Technetium		2, 3, 4, 6, 7
44		Ruthenium		3, 4, 6, 8
45		Rhodium		3, 4
46		Palladium		2, 4
47		Silver		1
48		Cadmium		2
49		Indium		1, 3
50		Tin		2, 4
51		Antimony		3, 5
52		Tellurium		2, 4, 6
53		Iodine		1, 3, 5, 7
54		Xenon		0
55		Caesium		1
56		Barium		2
57		Lanthanum		3
58		Cerium		3, 4
59		Praseodymium		3
60		Neodymium		3
61		Promethium		3
62		Samarium		2, 3
63		Europium		2, 3
64		Gadolinium		3
65		Terbium		3
66		Dysprosium		3
67		Holmium		3
68		Erbium		3
69		Thulium		2, 3
70		Ytterbium		2, 3
71		Lutetium		3
72		Hafnium		4
73		Tantalum		3, 5
74		Tungsten		2, 4, 5, 6
75		Rhenium		1, 4, 7
76		Osmium		2, 3, 4, 6, 8
77		Iridium		3, 4
78		Platinum		2, 4
79		Gold		1, 3
80		Mercury		1, 2
81		Thallium		1, 3
82		Lead		2, 4
83		Bismuth		3, 5
84		Polonium		2, 3, 4
85		Astatine		1, 3, 5, 7
86		Radon		0
87		Francium		1
88		Radium		2
89		Actinium		3
90		Thorium		4
91		Protactinium		4, 5
92		Uranium		3, 4, 5, 6
93		Neptunium		2, 3, 4, 5, 6
94		Plutonium		2, 3, 4, 5, 6
95		Americium		2, 3, 4, 5, 6
96		Curium		2, 3, 4
97		Berkelium		2, 3, 4
98		Californium		2, 3, 4
99		Einsteinium		2, 3
100		Fermium		2, 3
101		Mendelevium		2, 3
102		Nobelium		2, 3
103		Lawrencium		3

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