The half-life of strontium has been 25 years. Thus, option B is correct.
The half-life has been given as the amount of time required for an element to be reduced to half of its initial concentration. The half-life of the element has been given as:
[tex]A=\AA\;\dfrac{1}{2} ^\dfrac{t}{t1/2}[/tex]
Where, the initial concentration of sample, is given by [tex]\AA[/tex]
The final concentration of the sample is given by, A
The time of the reduction is given by t.
The half-life of the sample has been given by, t1/2
In the given graph, the initial concentration of the sample has been 100 grams. The time at which the concentration has been halved i.e. 50 grams is found after 25 years.
Thus, the half-life of strontium has been 25 years. Thus, option B is correct.
For more information about the half-life, refer to the link:
https://brainly.com/question/24710827
