CBSE Class 11-science Answered
In group 1 of periodic table , 3 elements A,B and C have atomic radii 95 pm,133 pm and 65 pm respectively.Giving a reason, arrange them in increasing order of their atomic nos of the group.Explain?
Asked by Vikas | 14 Mar, 2017, 05:57: PM
Expert Answer
C < A < B
As we move down the group, the number of shells increases.
This effect of having an extra shell of electrons outweighs the effect of increased nuclear charge.
Hence the atomic size increases.
Answered by | 14 Mar, 2017, 06:05: PM
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