the half -life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mas

Question

2 years ago

12

s. starting with 155 gramsbof a radioactive isotope, how much will be left after 3 half-lives?

1 answer:

SVETLANKA909090 [29] · Answer 1 · 2023-07-21T05:09:15+03:00

7 0

Answer:

after 3 half lives the amount should be reduced to 19.375g

Step-by-step explanation:

after the first half life , amount left =

155÷2

= 77.5g

2nd half life

77.5÷2

=38.75g

3rd Half life

38.75÷2

=19.375g