Chemistry, 25.07.2019 05:30 ahmetagayew2004

If 20.g of a radioactive isotope are present at 1: 00 pm and 5.0g remain at 2: 00 pm, what is the half life of the isotope?

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If 20.g of a radioactive isotope are present at 1: 00 pm and 5.0g remain at 2: 00 pm, what is the ha...

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