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Câu 8:

Khối lượng của nguyên tử ${}_1^2H$

Câu 8: Khối lượng của nguyên tử 12H{}_1^2H12​H gồm:

Thông tin câu hỏi

Câu 8:

Khối lượng của nguyên tử ${}_1^2H$ gồm: