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Without looking at the periodic table, s...

Without looking at the periodic table, select the elements belonging to same from the following list.

A

Z=12,38,4, 88

B

Z=9,16,3,35

C

Z=5,11,27,19

D

Z=24,47,42,55

Text Solution

Verified by Experts

The correct Answer is:
A
They have same valance shell configuration or their atomic numbers should differ by magic their atomic numbers differe by magic no. 2,8,8,18,32
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