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X :1s2 2s2 2p5. X là nguyên tố gì?

X :1s2 2s2 2p5. X là nguyên tố gì?
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X :1s2 2s2 2p5. X là nguyên tố gì?

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User Joshgo
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Answer:

Cấu hình điện tử của nguyên tố X là:

1s² 2s² 2p6 3s2 3p5

The electronic configuration of an element X is:

1s² 2s² 2p6 3s2 3p5

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User Keniesha
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