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c) Khối lượng $^{90}_{38} Sr$

c) Khối lượng 3890Sr^{90}_{38} Sr3890​Sr tích tụ trong xương sẽ giảm bớt 20% so với ban đầu sau thời gian t = 15 năm.

Thông tin câu hỏi

c) Khối lượng $^{90}_{38} Sr$ tích tụ trong xương sẽ giảm bớt 20% so với ban đầu sau thời gian t = 15 năm.