Question

valency of elements and symbols from 1-20

Answer 1

NUMBER SYMBOL ELEMENT VALENCE

1 H Hydrogen 1, 0, -1

2 He Helium 0

3 Li Lithium 1, -1

4 Be Beryllium 2

5 B Boron 3, 2, 1

6 C Carbon 4, 3, 2, 1, -1, -2, -4

7 N Nitrogen 5, 4, 3, 2, 1, 0, -1, -2, -3

8 O Oxygen 2, 1, 0, -1, -2

9 F Fluorine 0, -1

10 Ne Neon 0

11 Na Sodium 1, -1

12 Mg Magnesium 2

13 Al Aluminum 3, 1

14 Si Silicon 4, 3, 2, 1, -1, -2, -4

15 P Phosphorus 5, 4, 3, 2, 1, 0, -1, -2, -3

16 S Sulfur 6, 5, 4, 3, 2, 1, 0, -1, -2

17 Cl Chlorine 6, 5, 4, 3, 2, 1, 0, -1, -2

18 Ar Argon 0

19 K Potassium 1, -1

20 Ca Calcium 2