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Q.

In alkaline earth metals, the electrons are more firmly held to the nuclues and hence

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a

Ionization energy of alkaline earth metals is greater than that of alkali metals

b

Alkaline earths are less abundant in nature

c

Reactivity of alkaline earth metals is greater than that of alkali metals

d

Atoms of alkaline earth metals are bigger in size than alkali metals

answer is A.

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Detailed Solution

Effective nuclear forces of attractions on the valency electron increasesTherefore Ionisation energy increases
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