The ionisation energies for `B.Tl` and In are X.Y and ZK cal/mol respectively. Choose the correct relationship between them-

The ionisation energy for 'Sc', 'Y' and 'La' are x,y and z kcal/mol respectively. Choose the correct relationship between them.

Ionisation energies of CI^(-), CI and CI^(+) are respectively (in kJ/mol):

Ionisation energy of atoms A and B are 350 and 250 kcal mol^(-) respectively. The electron affinities of these atoms are 70 kcal mol^(-1) and 90 kcal mol^(-1) respectively then:

The first three successive ionisation energies of an element Y are 900, 1757 and 14850 kJ mol^(-1) respectively. The element Y belongs to