Question

which of the electron configuration below represent elements in the same family?
[He]2s^2
[Ne] 3s^1
[Ne] 3s^2
[Ne] 3s^2 3p^3
[[Ar]4s^` 3d^10
[Ar] 4s^1 3d^10 4p^6
[Ar] 4s^2 3d^10 4p^3
[Kr] 5s^1 4d^10
homework question! absent on the day of the lesson! very confused!

Answer 1

Look for two atoms that have the same outer electronic configuration. Ignore the inner orbitals like d.

Answer 2

??

Answer 3

so which one would it be?

Answer 4

Ray, I want you to look at the configurations. [He]2s^2
[Ne] 3s^1 have different outer electronic configs, so they are not the answer. One has 2 outer electrons and one has 1. Now go down the list.

Answer 5

is it [Ne] 3s^3 3o^3

Answer 6

3p^3