How does the atomic radius of the elements change on going (i) from left to right in a period, and
How does the atomic radius of the elements change on going
(i) from left to right in a period, and
(ii) down a group in the Modern Periodic Table ?
Give reason in support of your answer
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(i) Atomic radius decreases
Reason: Nuclear charge increases which tends to pull the electrons closer to the nucleus.
(ii) Atomic radius increases
Reason: Number of shells increases on going down the group.
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