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IE1 of alkaline earth metals are higher than that of alkali metals, but IE2 of alkaline earth metals are smaller than that of alkali metals. Give reason. |
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Answer» (i). IE1 of alkaline earth metals > IE1 of alkali metals. (ii). IE2 of alkaline earth metals < IE2 of alkali metals. (iii). This occurs because in alkali metals the second electron is to be removed from a cation, 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 monovalent 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 I elements. |
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