Basic information of Elements

                      Basic information of Elements

Sr. No.	Name of Elements	Molecular Formula (symbol)	Atomic Number	Electronic configuration	Valency
1	Hydrogen	H	1	(1)	1
2	Helium	He	2	(2)	0
3	Lithium	Li	3	(2,1)	1
4	Beryllium	Be	4	(2,2)	2
5	Boron	B	5	(2,3)	3
6	Carbon	C	6	(2,4)	4
7	Nitrogen	N	7	(2,5)	3
8	Oxygen	O	8	(2,6)	2
9	Fluorine	F	9	(2,7)	1
10	Neon	Ne	10	(2,8)	0
11	Sodium	Na	11	(2,8,1)	1
12	Magnesium	Mg	12	(2,8,2)	2
13	Aluminium	Al	13	(2,8,3)	3
14	Silicon	Si	14	(2,8,4)	4
15	Phosphorus	P	15	(2,8,5)	3
16	Sulphur	S	16	(2,8,6)	2
17	Chlorine	Cl	17	(2,8,7)	1
18	Argon	Ar	18	(2,8,8)	0
19	Potassium	K	19	(2,8,8,1)	1
20	Calcium	Ca	20	(2,8,8,2)	2