Which of the following molecules have an expanded octet (hypervalent)? — Chemical Bonding Chemistry Question

💡 Solution & Explanation

$BrF_5$ (12 $e^-$), $PCl_5$ (10 $e^-$), and $IF_7$ (14 $e^-$) have more than 8 electrons in the valence shell of their central atoms. $SiF_4$ has exactly 8 electrons.