Chemistry - CHEMICAL BONDING Question with Solution | TestHub

Structure (A): Silicon (Si) has 4 valence electrons and forms 4 single bonds with hydrogen atoms. This completes silicon's octet (8 electrons) and each hydrogen's duet, resulting in a stable, neutral molecule.

Structure (B): The NO₂ molecule is shown with an incorrect number of electrons; nitrogen should have a formal charge or an unpaired electron (radical).

Structure (C): In HNC, nitrogen typically forms three bonds and carries a formal charge, or carbon lacks a complete octet as drawn.

Structure (D): The ozone (O₃) molecule is incorrect because the central oxygen atom is missing its required lone pair to satisfy the octet rule.