If `n = 6`, the correct sequence for filling of electrons will be.

Options

A. `ns rarrn p rarr (n-1)d rarr (n-2)f`
B. `ns rarr (n-2)f rarr (n-1)d rarr np`
C. `ns rarr (n-1)d rarr (n-2)f rarr np`
D. `ns rarr (n-2) f rarr np rarr (n-1)d`

Answer

B

Explanation

According to Aufbau principle.