Question

Write the names and symbols of the first twenty elements that you have studied in class VI & VII.

Answer 1

Name of the elements	Symbol	Valency
1. Hydrogen	H	1
2. Helium	He	0
3. Lithium	Li	1
4. Beryllium	Be	2
5. Boron	B	3
6. Carbon	C	4
7. Nitrogen	N	3
8. Oxygen	O	2
9. Fluorine	F	1
10. Neon	Ne	0
11. Sodium	Na	1
12.Magnesium	Mg	2
13. Aluminium	AI	3
14. Silicon	Si	4
15.Phosphorus	P	3
16. Sulphur	S	2
17.Chlorine	CI	1
18.Argon	Ar	0
19. Potassium	K	1
20. Calcium	Ca	2