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Noble Gases

Elements belo...

Question

Elements belonging to the same group have similar properties because:

A

they have similar electronic configuration of the outermost shell.

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B

their atomic numbers go on increasing as we move down the group.

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C

all of them are metallic elements

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D

none of the above

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Solution

The correct option is A they have similar electronic configuration of the outermost shell.
Elements in same group have similar configuration of outermost shell. Thus the properties of elements that depend on the electronic configuration are similar for elements for same group.

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Q. Elements of the same group have similar valance shell electronic configuration. Hence they exhibit similar chemical properties. But elements of the same period have different valencies.

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