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)`
D. `(3E_1)/(2N_0) , (2E_2)/(3N_0)`

Answer

B

Explanation

I.E. of ` (3N_0)/(2) = E_1 ` , I.E. of 1 atom ` = (E_1 xx 2)/(3N_0) , ` E.A of ` (2N_0)/(3) = E_2 ` , E.A of 1 atom ` = (3E_2)/(2N_0)`