The first and second ionisation enthalpies (kJ/mol) of three elements A,B and c are given as A. B. C. (IE 1). 403. 549. 1142. 2640. 1040. 2080. Identify the element which is likely to be.
(a) a non metal
(b) an alkali metal
(c) an alkaline earth metal.
Also give reasons.