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The correct arrangement of O, P and N in order of increasing radii is

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O < N < P

P < O < N

O < P < N

N < O < P

answer is A.

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Detailed Solution

We know that higher the no. of shells more will be the radius...hence P is the largest among these.

Now, in the same period as the no. of electron increases ,radius shrinks due to inter atomic attraction..so O<N

Hence, O<N<P

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