The energy required to pull the most loosely bound electrons from an atom is known as ionization potential. It is expressed in electron volts. The value of ionization potential depends on three factors :(i) the charge on the nucleus (ii) the atomic radius and (iii) the screening effect of inner electron shells.
Ionization potential of Na would be numerically the same as
A. electron affinity of `Na^(+)`
B. electrongativity of `Na^(+)`
C. electron affinity of Na
D. ionization potential of Mg