IE_(1) of alkaline earth metals are higher than that of alkali metals, but IE_(2) of alkaline metals are smaller than that of alkali metals. Give reason.

IE_(1) of alkaline earth metals are higher than that of alkali metals,

1.	IE_(1) of alkaline earth metals are higher than that of alkali metals, but IE_(2) of alkaline metals are smaller than that of alkali metals. Give reason.
Answer» Solution :`IE_(1)` of ALKALINE EARTH metals gt `IE_(2)` of alkali metals. (ii) `IE_(2)` of alkaline earth metals lt IE, of alkali metals. (iii) This occurs because in alkali metals the SECOND ELECTRON is to be removed from a which has already acquired a noble GAS configuration. (iv) In the case of alkaline earth metals, the second electron is to be removed from a monoval cation, which still has one electron in the outermost shell. (v) Thus, the second electron can be removed more easily in the case of group 2 elements than in group 1 elements.