Question

$2s$ and $2p$ -atomic orbitals combine to give how many molecular orbitals?

• A. $2$
• B. $4$
• C. $8$
• D. $6$

Answer 1

Answer: (C)

$2s\to \left(\sigma 2s\right)\left({\sigma }^{\ast }2s\right)\left(2\right)$
$2p\to \left(\sigma 2p_z\right)\left({\sigma }^{\ast }2p_z\right)\left(\pi 2p_x\right)\left({\pi }^{\ast }2p_x\right)\left(\pi 2p_y\right)\left({\pi }^{\ast }2p_y\right)\left(6\right)$