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Question

Among the alkaline earth metals, the element forming predominantly covalent compound is:

A
barium
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B
beryllium
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C
strontium
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D
calcium
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Solution

The correct option is C beryllium
Option (B) is correct.
Beryllium predominantly forms covalent compound due to its small size (can't ionize easily). It has a smaller atomic radius and a large effective nuclear charge, it forms a covalent bond.
Beryllium shows a diagonal relationship with aluminium.

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