velavela velavela

23-01-2021
Biology

contestada

A uranium-235 sample starts with 200 atoms, and 700 million years later,
there are 100 atoms. What is the half-life of uranium-235?
A. 350 million years
B. 235 years
C. 100 years
D. 700 million years

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29shane 29shane

23-01-2021

I think it 700 million years because I took the same question and that’s what I put.

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