HALF-LIFE- the average time taken for HALF of the radioactive nuclei to decay
(basically for the count rate to reach half its value eg from 24 to 12)
- the ACTIVITY of a radioactive isotope is the number of atoms that decay per second.
the half-life of a rdaioactive isotope is the average time it takes:
- for the number of neuclei in the isotope in a sample to halve
- for the count rate of the isotope in a sample to fall its half…