Question

an element x has a mass number 4 and atomic number 2 find the velency of x​

Answer 1

Answer:

0

Explanation:

Electronic configuration of 'X' = 2 i.e. K shell is completely filled so, there is no valence electron and hence valency is zero.

Answer 2

Answer:

x has atomic no. 2 so it gas 2 electron.

The valency of element x is 0

because its electron are stable in the K shell.