Question

The half-life of Actinium-227, a radioactive isotope, is 22 years. About how long would it take 10 grams of the isotope to decay until there were only 2.5 grams left? Show your work please!

Answer 1

44 years will take for 10 grams of Actinium to decay until there were only 2.5 grams.

Step-by-step explanation:

The half life it tell you about the time in which half of the quantity of the isotope will decay.

time (years) quantity of isotope (grams)

0 10

22 5

44 2.5