Explain vakency with suitable example

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Emmett Trujillo

Business

4 September, 14:14

Explain vakency with suitable example

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Clarke · Answer 1

The first 20 elements of the periodic table:

1. H - Hydrogen

2. He-Helium

3. Li-Lithium

4. Be-Beryllium

5. B-Boron

6. C-Carbon

7. N-Nitrogen

8. O-Oxygen

9. F-Fluorine

10. Ne-Neon

11. Na-Sodium

12. Mg-Magnesium

13. Al-Aluminum

14. Si-Silicon

15. P-Phosphorus

16. S-Sulfur

17. Cl-Chlorine

18. Ar-Argon

19. K-Potassium

20. Ca-Calcium

The valency of first 20 elements is as follows : -

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 (Al) = 3

14. Silicon (Si) = 4

15. Phosphorus (P) = 3, 5

16. Sulphur (S) = 2

17. Chlorine (Cl) = 1

18. Argon (Ar) = 0

19. Potassium (K) = 1

20. Calcium (Ca) = 2

Explanation:

First 20 elements in the periodic table start with H and end with Ca. The quickest way to remember the number of valence electrons is to form a relationship with the number of the group the element is located in.