Chemistry, 25.07.2021 14:00 dtilton2003

Nguyên tố R có 3 đồng vị là X, Y, Z. Tổng số hạt của 3 đồng vị là 186. Số notron của động vị X ít hơn số notron của đồng vị Y là 2 hạt. Đồng vị Z có số proton bằng số notron. Số khối của đồng vị X là bao nhiêu?

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Nguyên tố R có 3 đồng vị là X, Y, Z. Tổng số hạt của 3 đồng vị là 186. Số notron của động vị X ít hơ...

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