lilwave230 lilwave230

21-05-2021
Chemistry

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A potassium-40 sample starts with 50 atoms, and 1.25 billion years later, there are 25 atoms. What is the half-life of potassium-40?

A. 2.5 billion years
B. 25 years
C. 40 years
D. 1.25 billion years

Respuesta :

ruinosu ruinosu

21-05-2021

D. 1.25 billion years

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