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Title: A sample containing 4.0 × 1018 atoms of a radioactive isotope decays with a half-life of 2.3 years. ... Post by: Chery on Dec 6, 2016 A sample containing 4.0 × 1018 atoms of a radioactive isotope decays with a half-life of 2.3 years. How many undecayed atoms are left after 3.7 years?
A) 2.5 × 1018 B) 1.7 × 1018 C) 1.3 × 1018 D) 1.1 × 1018 Title: Re: A sample containing 4.0 × 1018 atoms of a radioactive isotope decays with a half-life of 2.3 ... Post by: lyall on Dec 6, 2016 Content hidden
Title: Re: A sample containing 4.0 × 1018 atoms of a radioactive isotope decays with a half-life of 2.3 years. ... Post by: Chery on Jan 13, 2017 I needed this so much, thanks
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