Question

Hint: The half life of an element is the amount of time it takes for half of that element sample to decay into a different

element
Based on the graph of radioactive decay for Co-60, how many years does it take for a 10 gram sample of Co-60 to decay into a 125
gram sample?
-0.)
A)
3 years
B)
5.27 years
15.8 years
D)
3 half lives
^ $* ENG

Answer 1

Concept: Half-life

1. Just a general tip, learn to format your question and fix any grammatical issues.
2. Post the question as a picture instead next time, because the copy and pasting clearly failed for you.
3. I'm assuming you mean 1.25 grams.
4. So it would take 3 years