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Question

নিচের কোন ক্ষেত্রে পরমাণুর বা আয়নটির ইলেক্ট্রন বিন্যাস সঠিক নয় নাই?

{}^{11}N a^{+} \to 1 s^{2} 2 s^{2} 2 p^{6}

{}^{20}C a \to 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2}

{}^{17}C l^{-} \to 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}

Try your self

ANS : 4

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