Question

14. How does the number of :
valence electrons and
valency vary on moving from left to right in the
third period of the periodic table ?​

Answer 1

Answer:

Number of valence electrons increases where as valency first increases then decreases on moving from left to right.

Explanation:

Number of valence electrons increases as the number of electrons in the last shell keeps on increasing with the increasing atomic number.

Valency first increases then decreases because when the number of valence electrons is in 1-4 range the valency increases where as when the number of valence electrons is in 5-8 range the valency decreases with each increasing atomic number.