Question

what isvalency defination​

Answer 1

Answer:

Explanation:

number of atoms it can gain or lose in an element to become stable  is defined as its valency  

for eg

sodium  electronic configuration is 2 8 1

it will lose one electron to become stable so its valency is  1

hope it helps !

Answer 2

the valency of an element is an number of hydrogen atoms that can combine with or replace (either directly) one atom of the element.