Radium-226, an isotope of radium, has a half-life of 1,601 years. Suppose your chemistry teacher has a 50-gram sample of radium-226. How much of the sample will be remaining after 100 years?
we know that Half-life is modeled by the formula An=A0*(0.5)^[t/h)] where An----------> is the amount remaining after a time t A0----------> is the initial quantity t------------> is the time h------------> is the half-life of the decaying quantity
in this problem h=1601 years A0=50 g An=? t=100 years An=A0*(0.5)^[t/h)]---------> An=50*(0.5)^[100/1601)]-----> 47.88 gr
