Question

Which set of quantum numbers is possible for the last electron of Mg⁺ ion?

• A. n=3, l=2, m=0, s=+1/2
• B. n=2, l=3, m=0, s=+1/2
• C. n=1, l=0, m=0, s=+1/2
• D. n=3, l=0, m=0, s=+1/2

Answer 1

The correct option is D

n=3, l=0, m=0, s=+1/2

Last electron of Mg⁺ is 3s¹.