How much of a radioactive kind of calcium will be left after 10 days if the half-life is 5 days and you start with 64 grams? Please help me thanks !

Question

asked Feb 20, 2021 21.0k views

1 Answer

Eduard Grigorescu · Answer 1 · 2021-02-23T22:29:48+0000

Answer: 16 g

Explanation:

We can solve this with the Radioactive Half Life Formula:

$A=A_(o).2^{(-t)/(h)}$

Where:

is the final amount of radioactive calcium

A_(o)=64 g is the initial amount of radioactive calcium

t=10 days is the time elapsed

h=5 days is the half life of radioactive calcium

Solving with the given data:

$A=(64 g)2^{(-10 days)/(5 days)}$

A=16 g This is the amount of radioactive calcium left