The first ionisation energies of alkaline earth metal are higher than those of the alkali metals. This is because:A. there is increase in the nuclear charge of the alkaline earth metalB. there is decrease in the nuclear charge of alkaline earth metalC. there is no change in the nuclear chargeD. none of these

The first ionisation energies of alkaline earth metal are higher than

1.	The first ionisation energies of alkaline earth metal are higher than those of the alkali metals. This is because:A. there is increase in the nuclear charge of the alkaline earth metalB. there is decrease in the nuclear charge of alkaline earth metalC. there is no change in the nuclear chargeD. none of these
Answer» Correct Answer - A Along the period from left to right, atomic number increaes and, therefore, nuclear charge also increases. So first ionization energies of alkaline earth metals are higher than those of the alkali metals of the same period because of higher nuclear charge.

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