# The first ionisation energies of alkaline earth metal are higher than those of the alkali metals. This is because:

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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 metal

(B) there is decrease in the nuclear charge of the alkaline earth metal

(C) there is no change in the nuclear charge

(D) none of these

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(A) there is increase in the nuclear charge of the alkaline earth metal