Metals have few electrons in their valence shell while non-metals generally have more electrons in their valence shell. Metallic character is closely related to atomic radius and ionisation enthalpy. Metallic character increases from top to bottom in a group and decreases from let to right in a period of periodic table. metallic character is inversely related to electronegativity of element.
Q. 3 `N_0//2` atoms of `X_((g))^(-)` by energy `E_(2)`. hence, ionisation potential and electron affinity of `X_((g))` are: (`N_(0)`=Avogadro's number)

Options

A. `(2E_(1))/(3N_(0)),(2E_(2))/(3N_(0))`
B. `(2E_(1))/(3N_(0)),(3E_(2))/(2N_(0))`
C. `(3E_(1))/(2N_(0)),(3E_(2))/(2N_(0))`
D. `(3E_(1))/(2N_(0)),(2E_(2))/(3N_(0))`

Answer

B