Which information can be determined using half-life?

Answer : In radioactive decay, the half-life is the length of time after which there is a 50% chance that an atom will have undergone nuclear decay. It varies depending on the atom type and isotope, and is usually determined experimentally.

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as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.