1.

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)

Answer»

`(2E_(1))/(3N_(0)),(2E_(2))/(3N_(0))`
`(2E_(1))/(3N_(0)),(3E_(2))/(2N_(0))`
`(3E_(1))/(2N_(0)),(3E_(2))/(2N_(0))`
`(3E_(1))/(2N_(0)),(2E_(2))/(3N_(0))`

Answer :B


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