Question

The first (IE₁) and the second (IE₂) ionization enthalpies in (kJ mol^-1) of three elements I, II, III are given below:

                  I           II           III

IE₁          403       549       1142

IE₂         2640     1060      2080

Identify the element which is likely to be

(a) a non-metal

(b) An alkali metal

(c) An alkaline earth metal

Answer 1

(a) II is an alkaline earth metal

(b) I is an alkali metal

(c) III is a non-metal