Question

Uranium-238 is an isotope. It has a half-life of 4.5 Billion years. 13.5 Billion years have passed so how much Uranium is left if we started with 5000g?

Answer 1

@johnweldon1993 anyone can help me?!

Answer 2

Hang on trying to solve it :)

Answer 3

Ok Thank You Take your time!

Answer 4

So basically...Just from the half life formula it would be

\[\huge N(t) = 5000g(\frac{1}{2})^{\frac{13.5}{4.5}}\]

Answer 5

Aha.. These are my answer choices for the question!
1250g
625g
13.5g

Answer 6

That would be 625g :)

Answer 7

Thank You! :)