In the following set of elements, one element does not belong to the set. Select this element and explain why it does not belong :

Calcium, Magnesium, Sodium, Beryllium

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Solution

In the given set of elements, i.e., calcium, magnesium, sodium and beryllium, the element sodium does not belong to the set. This is because sodium is a group 1 element and the remaining three elements belong to group 2. Elements of the same group show similar chemical properties.

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