How many bonding atoms and non-bonding electron pairs(central atom) are in the following? a. SiI4 b. KrF2 c. HCN d. CH2O e. KrF4

Answer 1

SiI₄

Si is the central atom. It has 4 bonding atoms. It has no non-bonding electron pairs

KrF₂

Kr is the central atom. It has 2 bonding atoms. It has 3 non-bonding electron pairs

HCN

C is the central atom. It has 2 bonding atoms. It has no non-bonding electrons

CH2O

C is the central atom. It has 3 bonding atoms. It has no non-bonding electrons

KrF₄

Kr is the central atom. It has 4 bonding atoms. It has 1 non-bonding electron pair