$1$ milligram of $90$Sr upon secular equilibrium will be how many grams of $90$Y$?90$Sr $->90$ The half$-$life of $90$Sr is $29\mathrm{.}12$ years, and the half$-$life of $90$Y is $64$ hours.

$$$$

Answer rating: 100% (QA)

To solve this problem we need to use the concept of radioactive decay and secular equilibrium Secular equilibrium occurs when the rate of decay of the ... View the full answer