Question

What is the half-life of strontium-90? please explain your answer!

Answer 1

The right answer is 28 years.

The half-life, or period of a radioactive isotope, is the time required for half of the nuclei of this isotope initially present to decay naturally.

One gram of pure 90 strontium has a radioactivity of 5.11 TBq. Its beta radiation is not penetrating, which makes it difficult to measure when it is in the soil or a matrix. It is very harmful when the particle is inhaled or ingested.

Answer 2

28 years.

The half life is exactly what it means. We want to know how many years it takes for the Strontium-90 to go from 100% to 50% to 25% etc