Question

state the number of electrons that are gained by atoms of each of the following to obtain a stable electron
part a
cl
express your answer as an integer.
n = electrons

Explanation:

Step1: Recall chlorine's electron - configuration

Chlorine has 7 valence electrons.

Step2: Determine stable electron - configuration

A stable electron - configuration for chlorine is having 8 valence electrons (octet rule).

Step3: Calculate number of electrons to gain

To get 8 valence electrons from 7, it needs to gain 1 electron.

Answer:

1