Question

I. Write the symbol and valency for the following elements:
1. Hydrogen 16. Oxygen
2. Nitrogen 17. Fluorine
3. Chlorine 18. Carbon
4. Lithium 19. Sodium
5. Potassium 20. Aluminium
6. Zinc 21. Lead
7. Copper 22. Beryllium
8. Boron 23. Sulphur
9. Phosphorous 24. Magnesium
10. Iron 25. Barium
11. Calcium 26. Silicon
12. Bromine 27. Cobalt
13. Nickel 28. Iodine
14. Gold 29. Silver
15. Mercury 30. Manganese

Answer 1

hydrogen H. . 1

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Answer 2

Answer:

1)H:Valency=1

2)N; 3

3)Cl; 1

4)Li; 1

5)K; 1

6)Zn; 2

7)Cu; 2

8)B; 3 or 5

9)P; 3

10)Fe; 2

11)Ca; 2

12)Br; 1

13)Ni; 10

14)Au; 1

15)Hg;

16)O; 2

17) F; 1

18)C; 4

19)Na;1

20)Al; 3

23)S; 2

24)Mg; 2

25)Ba; 2

26)Si; 4

27)Co;

28)I; 1

29) Ag; 1 and 3

30) Mn; 3

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Explanation: