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thanhxaiya
2 năm trước
Nguyên tử của nguyên tố X có tổng số hạt cơ bản là 82 . Trong đó hạt mang điện nhiều hơn hạt không mang điện là 22. a, Tìm số hạt mỗi loại. b, Xác định tên nguyên tố X. c, Tính khối lượng của nguyên tử X theo gam. Biết 1 nguyên tử cacbon có khối lượng là 1,9926.10-23 (g), mP ≈ mN ≈ 1 (đvC)
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