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Which of the following element is different from the other group 2 elements?

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in Chemistry – Class 11 by (148k points)
Which of the following element is different from the other group 2 elements?

(a) magnesium

(b) beryllium

(c) calcium

(d) strontium

This question was addressed to me in an internship interview.

This key question is from s-Block Elements in portion s-Block Elements of Chemistry – Class 11

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Correct choice is (b) beryllium

To explain I would say: Beryllium, differs from the rest of the members of its group due to the following reasons: beryllium has a small atomic and ionic size, it has no vacant d-orbitals and it has a higher charge density comparatively.

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