Understand the Concept of a Valency Chart

Let us understand the concept of a Valency Chart and its significance.

What is Valence?

The degree of the combining power of an element depicted by the number of atomic weights of any monovalent element, like hydrogen, with which the weight of that particular element will either combine or for which substitution or comparison is possible is known as valence. In simple words, it is the degree of the combining power of an element with every atom when forming a compound or molecule. Valence describes connectivity. This Valency chart is extremely important.

The Valence Table

Source: Science Notes

Note: The common valence values are in bold.

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

This Valency chart is also available in a color periodic chart but the core information that one is to draw from this is the name, symbol , and valence of an element.

To understand the periodic classification of elements, visit here.