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ngtien2004stkt
2 năm trước
Tổng số hạt trong nguyên tử Y là 50, số hạt mang điện tích nhiều hơn hạ không mang điện tích là 14. Tính số hạt mỗi loại giúp em với nha em xin cảm ơn ạ <3
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