Chemistry
Chemistry, 31.07.2021 14:00, baches

NGUYÊN TỬ của nguyên tố R có khối lượng nặng gấp 14 lần nguyên tử Heli. Hãy cho biết : - Nguyên tử R là nguyên tố nào ?

- Số p, số e trong nguyên tử.

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NGUYÊN TỬ của nguyên tố R có khối lượng nặng gấp 14 lần nguyên tử Heli. Hãy cho biết : - Nguyên tử...

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