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The species Ar,K^(+) and Ca^(2+) contain...

The species `Ar,K^(+)` and `Ca^(2+)` contain the same number of electrons. In which order do their radii increase ?

A

`Ca^(2+) lt K^(+) lt Ar`

B

`K^(+) Ar lt Ca^(2+)`

C

`Ar lt K^(+) lt Ca^(2+)`

D

`Ca^(2+) lt Ar lt K^(+)`

Text Solution

Verified by Experts

The correct Answer is:
A
In case of isoelectronic species, radius decreases with increase in nuclear charge.
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