Question

Using the abbreviated notation, the ground state electron configuration of Y^3+ is:

a) Kr
b) Ar 4s^2 5d^10 4p^6 5s^2 4d^1
c) Kr 5s^2 4d^4
d) Ar 4s^2 5d^10 4p^5 4d^1

Answer 1

The ground state electron configuration of Y^3+ is Kr 5s^2 4d^4.

Step-by-step explanation:

The ground state electron configuration of Y^3+ can be determined by removing three electrons from the neutral atom, Y. The electron configuration of Y is [Kr]5s^2 4d^1, so removing three electrons gives us [Kr]5s^2 4d^4. Therefore, the correct answer is c) Kr 5s^2 4d^4.