Among elements with the following electronic configurations, the one w

1.	Among elements with the following electronic configurations, the one with the largest radius is
Answer» `1s^2 2s^2 2p^6 3s^2` `1s^2 2s^2 2p^6 3s^2 3p^1` `1s^2 2s^2 2p^6 3s^2 3p^2` `1s^2 2s^2 2p^6 3s^2 3p^5` ANSWER :A

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