Physics, 05.05.2020 00:51 dlow2243

A 400. g sample of strontium 90 is allowed to decay for 280 years.

If Sr-90 has a half life of 28 years, how much Sr-90 remains?
How much total mass remains (Sr-90 and more stable isotopes combined)?
What quantity of more stable isotopes exist?

Answers: 3

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A 400. g sample of strontium 90 is allowed to decay for 280 years.

If Sr-90 has a half l...