Chemistry - PERIODIC TABLE Question with Solution | TestHub

The value of electron gain enthalpy of an element can be -ve or +ve

In the periodic table generally metallic character of the elements increases down the group and decrease across the period

${\mathrm{Na}}^{+}$and $F^{-}$are isoelectronic species but first one is not smaller in size than the second

Ionization enthalpy of an atom is equal to magnitude of electron gain enthalpy of cation