The half-life of uranium-235 is 700 million years. If you start with 50 atoms of it, how many will you have left after 700 million years?

A. 50

B. 100

C. 25

D. 45

Question

Mathematics

Huerta

7 October, 06:55

The half-life of uranium-235 is 700 million years. If you start with 50 atoms of it, how many will you have left after 700 million years?

A. 50

B. 100

C. 25

D. 45

+3

Answers (1)

Know the Answer?

Gabriela Bell · Answer 1

The answer is

A half life pertains to the time it takes for exactly half of a substance to disappear. So, if U235 has a half life of 700 million years, it will take 700 million years for half of it to decay. That would leave. 5kg or 500g.

The half-life of uranium-235 is 700 million years. If you start with 50 atoms of it, how many will you have left after 700 million years?A. 50B. 100C. 25D. 45

The half-life of uranium-235 is 700 million years. If you start with 50 atoms of it, how many will you have left after 700 million years?

A. 50

B. 100

C. 25

D. 45