Question

1g of sr gets converted 0.953g after 2 years .the half life of sr is

Answer 1

I'm not sure but trying to solve your problem.
If it's wrong then I'm sorry.

After 1st half life the amount of sr is 1/2=0.5g

0.953=2 years
0.5 = x
by cross multiplication
x(0.953)=(0.5)(2)
x=1.04 years