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

A)

[Ar]

B)

[He]

C)

[H]

D)

[Ne]

B) He

Step-by-step explanation:

This ion has gained 3 valence electrons, meaning it is a full octet or all 8 valence electrons in its outer most shell

The only atom there that is a noble gas or full octet is He or Helium

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square