Question

What's the electron configuration of an N-3 ion?
Question 3 options:

A)

[Ar]

B)

[He]

C)

[H]

D)

[Ne]

Answer 1

N means nitrogen

Lets look at the EC

$\\ \sf\bull\longmapsto 1s^22s^22p^3$

• -3 means it has got 3 electrons

$\\ \sf\bull\longmapsto 1s^22s^22p^6$

$\\ \sf\bull\longmapsto [Ne]$