Drago's Rule explains why certain molecules possess bond angles close to . Why does the bond angle i — Chemical Bonding Chemistry Question

💡 Solution & Explanation

Drago's Rule states that elements of the 3rd period and below do not undergo hybridization when bonded to less electronegative atoms like Hydrogen. Because nearly pure $p_x$, $p_y$, and $p_z$ orbitals (which are $90^\circ$ apart) are used for bonding, the resulting bond angle in $PH_3$ is close to $90^\circ$.