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thuphung9901
2 năm trước
Một nguyên tố A có thể tạo ra 2 oxit: Oxit thứ nhất là AOx có chứa 50%oxi về khối lượng. Oxit thứ hai là AOy có chứa 60% về khối lượng. Định tên nguyên tố A.
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