Question

Assertion : The ionisation enthalpies of alkaline earth metals are fairly

low.

Reason : In general, the low ionisation enthalpies of alkaline earth metals are

due to large size of their atoms​

Answer 1

Answer:

Reason: The low ionisation enthalpies of the alkaline earth metals is because of their strong tendency to lose electrons due to their smaller nuclear charge and comparatively larger atomic size which results in weaker forces of attraction between the valence electrons and the nucleus.

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Answer 2

Answer:

Both  A and R are true

Explanation:

The low ionisation enthalpies of the alkaline earth metals is because of their strong tendency to lose electrons due to their smaller nuclear charge and comparatively larger atomic size which results in weaker forces of attraction between the valence electrons and the nucleus.