The rubidium isotope 8Rb is a ß emitter witha half life of 4.9 × 1010 y .It is used to determine the age of rocks andfossils. Rocks containing the fossils of earlyanimals contain a ratio of Sr toAssuming that there was nowhen the rocks were formed, calculate the ageof these fossils.Answer in units of y.that decays into 87Sr.87 Rb of 0.02.87 Sr present

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The rubidium isotope 8Rb is a ß emitter with a half life of 4.9 × 1010 y that decays into 87Sr. It is used to determine the age of rocks and fossils. Rocks containing the fossils of early animals contain a ratio of Sr to 87 87Rb of 0.02. Assuming that there was no 8"Sr present when the rocks were formed, calculate the age of these fossils. Answer in units of y.

The rubidium isotope 8Rb is a ß emitter with a half life of 4.9 × 1010 y that decays into 87Sr. It is used to determine the age of rocks and fossils. Rocks containing the fossils of early animals contain a ratio of Sr to 87 87Rb of 0.02. Assuming that there was no 8"Sr present when the rocks were formed, calculate the age of these fossils. Answer in units of y.

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