X has 1.8 x 10^15 atoms and its half life is 8h, after 24h its gonna have 2.25 x 10^14 atoms left.
what is the energy transfer from the sample in 24h if the isotope emits alpha particles of energy 5MeV.
so i know energy transfer = AE,
A = N/t so the atoms that had decayed after 24h is 1.575 x 10^15, so that divided by (24 x 60 x 60) is 1.8 x 10^10, and that multiplied by 5MeV, i thought would give me the answer but it didn't.
what am i doing wrong?