Question

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6.In group 1 of periodic table three elements X, Y and Z have atomic radii 133 pm, 95pm and5pm
respectively. Arrange them in the increasing order of their atomic number. Give reason.
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Answer 1

Explanation:

X – 1.33 Å; Y – 0.95 Å; Z – 0.60 Å. The order of increasing atomic numbers is : Z < Y < X. This order is due to the fact, that greater is the