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Câu 36:

$^{210}Po$

Câu 36: 210Po^{210}Po210Po có chu kì bán rã 138 ngày, ban đầu có 20g. Hỏi sau 100 ngày còn lại bao nhiêu hạt?

Thông tin câu hỏi

Câu 36:

$^{210}Po$ có chu kì bán rã 138 ngày, ban đầu có 20g. Hỏi sau 100 ngày còn lại bao nhiêu hạt?