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কোনটি P এর সঠিক ইলেকট্রন বিন্যাস?

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 2 p^{6} 4 s^{1}

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{3}

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2}

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{2}

ANS : 2

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