Values of `1^(st)` four ionisation energies `(kJ//mol)` of an element are respectively 496, 4563, 6913, 9541 the electronic configuration of that element can be.

Write the electronic configuration of the first four elements in this group.1st.

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

The electron affinity values of element A, C and D are respectively -135,-60,-200 and -348 kJ mol^(-1) . The outer electronic configuration of element B is

If the ionisation energy and electron affinity of an element are 275 and 86 Kcals "mol"^(-1) respectively, the electronegativity of that element on Mulliken scale is

The electron affinity values of elements A,B, C and D are respectively -135, -60, -200 and -348 kJ mol^(-1) . The outer electronic configuration of elecment B is