Question

s) Valency what is the meaning​

Answer 1

Answer:

Valency is the combining power of atom..

Explanation:

example :

take Na

electronic configuration = 2,8,1

so, now Na can either give 1 eletron or take 7electron to complete its octet.

since its easy to give 1 e- than taking 7 Na will lose electron and form cation Na+

Answer 2

Explanation: The combining power, or affinity of an atom of a given element is determined by the number of hydrogen atoms that it combines with. In methane, carbon has a valence of 4; in ammonia, nitrogen has a valence of 3; in water, oxygen has a valence of 2; and in hydrogen chloride, chlorine has a valence of 1.