Exercise 1.3 Covalent Bonding, Shapes of molecules and Polyatomic Ions 1. (a) 1 (b) (i) 2 (ii) 1 (iii) In (ii) two of the bonding electrons are delocalised over the two oxygen atoms on the carbonyl carbon. The negative charge is considered to be shared equally between all three atoms and not to be residing on either oxygen. In (i) the negative charge is attached completely, i.e. localised, on only one of the oxygen atoms.
Exercise 1.3 Covalent Bonding, Shapes of molecules and Polyatomic Ions 1. (a) 1 (b) (i) 2 (ii) 1 (iii) In (ii) two of the bonding electrons are delocalised over the two oxygen atoms on the carbonyl carbon. The negative charge is considered to be shared equally between all three atoms and not to be residing on either oxygen. In (i) the negative charge is attached completely, i.e. localised, on only one of the oxygen atoms.