The 71st electron of an element X with an atomic number of 71 enters into the orbital: 6p, 4f, 6s, 5d<p></p>

The correct option is D. 5d
Electronic Configuration of Element X with atomic number 71 is [Xe]4f146s25d1. The Last electron will enter in 5d orbital. Hence, the correct option is D.

Eduprobe

Question:

The 71st electron of an element X with an atomic number of 71 enters into the orbital: 6p, 4f, 6s, 5d

Solution: