21. Nuclear Chemistry
Radioactive Half-Life
14PRACTICE PROBLEM
A 2.5 g sample of rock contains thorium and produces 46 dis/s. Calculate the percent by mass of 232Th in the rock if the half-life of 232Th is 1.405×1010 yr.
A 2.5 g sample of rock contains thorium and produces 46 dis/s. Calculate the percent by mass of 232Th in the rock if the half-life of 232Th is 1.405×1010 yr.