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Ne ইলেকট্রন বিন্যাস কোনটি?

1 s^{2} 2 s^{2} 2 p^{5}

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

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

কোনটিই নয়

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