Question

The maximum no. of electrons having parallel spin in the configuration $4s^{2}4p^5$ are:

• A. $7$
• B. $4$
• C. $3$
• D. $5$

Answer 1

Answer: (B)

$4$

Configuration is $4s^{2}4p^5$.
Therefore, the s orbital electrons is paired and two of the orbitals in p subshell are fully filled.
Therefore, the coniguration is like $4s^{2}4p_x^{2}4p_y^{2}4p_z^1$.