Question

Uranium-235 has a half-life of 700 million years. How long does it take a 5-

gram sample of Uranium-235 to decay to a mass of 2.5 grams?

Answer 1

700 million years

Step-by-step explanation:

I just got it right on apex

Answer 2

700 million years

Step-by-step explanation:

The term "half-life" refers to the amount of time it takes for the radioactive isotope to decay to half its original quantity. Here, that means the 5-gram sample will decay to 2.5 grams in one half-life.

It will take 700 million years for 5 g to decay to 2.5 g.