Chemistry, 09.11.2021 21:20 shayhiddinovxasan93
Biết nguyên tử X nặng gấp 2,5 lần nguyên tử oxi. Tính nguyên tử khối của X và cho biết X thuộc nguyên tố nào? Viết KHHH của nguyên tố đó.
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Biết nguyên tử X nặng gấp 2,5 lần nguyên tử oxi. Tính nguyên tử khối của X và cho biết X thuộc nguyê...
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