Question

Which of the following electronic configuration is not possible?
(A) 2p⁶
(B) 3s¹
(C) 2p⁵
(D) 3f¹²

Answer 1

3f12 is not possible electronic configuration

Answer 2

Answer:

correct Answer is option D: 3f¹²

Explanation:

Electronic configuration is the arrangement of electrons n shells, subshells and orbitals.

3f¹² is not possible because :

for n=3, l=0 to n-1

so l= 0,1,2

So we have only s,p,d orbitals.

Third energy level can have only s,p,d orbitals