A radioisotope tritium has half life of 12.3 years lf the initial amount of tritium is 32mg,how many milligrams of it will remain after 49.2 years
Answers
2 mg of radioactive isotope Tritium will remain after 49.2 years
Half life is the time required for radioactive element to become half of the present amount.
Given :
A radioactive isotope Tritium has a half life of 12.3 years.
If the initial amount of Tritium is 32mg.
We can expect it to 16 mg by 12.3 years.
After 12.3 years again, It would be 8 mg.
Further more, It would be 4 mg after next 12.3 years.
Finally, 2mg would be left after another 12.3 years.
This can be written,
Initial - 32 mg
12.3 years - 16 mg
24.6 years - 8 mg
36.9 years - 4 mg
49.2 years - 2 mg.
Therefore, 2 mg of radioactive isotope Tritium will remain after 49.2 years if the half life of Tritium is 12.3 years and 32 mg is taken initially.
Answer:
2mg
Explanation:
Half life = 12.3 years
Therefore, 49.2 years = 4 half life
In each half life amount becomes half, after 4 half-lives amount becomes
16
1
. Therefore, amount remained =
16
32
=2 mg.