Question

Which one of the following orbital is filled first in case of $N_2$?

• A. $\pi 2p_y$
• B. $\sigma 2p_z$
• C. ${\sigma }^{\ast }2p_z$
• D. ${\pi }^{\ast }2p_x$

Answer 1

The correct option is A

$\pi 2p_y$

Because of Stark and Zeeman effect (which you will read in higher classes), for atomic number $<8,\pi$ orbitals are filled first in 2nd energy level.