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Na (11) এর ইলেকট্রন বিন্যাস কোনটি?

I s^{2} 2 s^{2} 2 p^{5} 3 s^{2}

I s^{2} 2 s^{2} 2 p^{4} 3 s^{2}

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

I s^{2} 2 s^{3} 2 p^{3} 3 s^{4}

ANSWER : 3

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