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Calculating Mass and Decay: Example Questions

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Part 1:

(7-atomic mass)Be decays with a half-life of about (53-atmic mass) d. It is produced in the upper atmosphere, and filters down onto the Earth's surface. If a plant leaf is detected to have 374 decays/s of (7-atomic mass)Be, how many days do we have to wait for the decay rate to drop to 14.2/s?

Part 2:

Calculate the initial mass of 7-Be on the leaf.

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Solution Summary

Provides steps necessary to calculate both mass and decay rate.

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