atomic size#!#ionisation energy

Discuss the general characteristics of Group 15 elements with reference to their electronic configuration, oxidation state, atomic size, ionisation enthalpy and electronegativity.

Is the ionisation energy of an isolated free atom different from the ionisation energy E_(g) for the atoms in a crystalline lattice

The ionisation energy of hydrogen atom is 13.6eV. What is the ionisation energy of He ?

lonisatiori energy for hydrogen atom in the ground state is E.What is the ionisation energy of Li^(++) atom in the 2^(nd) excited state?

The ionisation enrgy of H-atom is 13. 6 eV . What will be ionisation energy ofg He^(2+) . Ions ?

The first ionisation energy of first atom is greater than that of second atom, whereas reverse order is true for their second ionisation energy. Which set of elements is in accordance to above statement?

If electron affinity of an element is 6 eV/atom and ionisation energy is 16.4 eV/atom then electronegativity of element on Pauling scale is