Question

how do the outer shell electron configurations for ions of group 1,group 2, and group 15 how did the outer shell electron configurations for ions of Group 1 group 2 and group 15 group 16 and group 17 elements compared with those of the noble gases

Answer 1

Explanation: Outer shell electronic configuration for Group 18 is :

$\text{Group 18: }ns^2np^6$ ( have 8 electrons in the outer shell)

The electronic configurations for other groups are:

$\text{Group 1: }ns^1$ ( have 1 electron in the outer shell}

$\text{Group 2: }ns^2$ ( have 2 electrons in the outer shell)

$\text{Group 15: }ns^2np^3$ ( have 5 electrons in the outer shell)

$\text{Group 16: }ns^2np^4$ ( have 6 electrons in the outer shell)

$\text{Group 17: }ns^2np^5$ ( have 7 electrons in the outer shell)

Comparing the electron configurations of group 18 to other groups.

Group 18 has fully filled outer shell, that is 8 electrons in the outer shell, while others are partially filled.