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Title: Rubidium87 decays by beta decay with a half-life of 4.9 1010 yr. How many 87Rb atoms are in a moon ... Post by: susu on Oct 30, 2023 Rubidium–87 decays by beta decay with a half-life of 4.9 × 1010 yr. How many 87Rb atoms are in a moon rock sample that has a rubidium decay rate of 3,500 disintegrations per hour?
▸ 9.0 × 1016 atoms ▸ 4.3 × 10–4 atoms ▸ 2.2 × 1018 atoms ▸ 2.5 × 1014 atoms ▸ 1.7 × 1014 atoms Title: Re: Rubidium87 decays by beta decay with a half-life of 4.9 1010 yr. How many 87Rb atoms are in a moon ... Post by: nnenne on Oct 30, 2023 Content hidden
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