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Which of the following electronic config...

Which of the following electronic configuration in the outermost shell is characterstic of alkali metals? A)`(n-1) s^(2) p^(6), ns^(2) p^(1)` B)`(n-1) s^(2)p^(6), d^(10), ns^(1)` C)`(n-1) s^(2)p^(6), ns^(1)` D)`(n-1) s^(2)p^(6), ns^(1)`

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Which of the following electronic configurations has the lowest ionization enthalpy ? (a) 1s^2 , 2s^2 , 2p^6 , ,(b) 1s^2 , 2s^2 , 2p^6 (c) 1s^2 , 2s^2 , 2p^6 , 3s^2 .

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(n-1)d^(10)ns^(2) is electronic configuration of …..