Question

In third period of modern periodic table , the no. of valence electrons present in that element which has positive electron gain enthalapy out of the following is:
A. 8
B. 6
C. 4
D. 5​

Answer 1

Answer:

A. 8

Explanation:

The element is Argon

As the stable element converts to unstable element for positive gain enthalpy and except argon all are already unstable

And the valence electron are 8 in argon