Geologic dating definition

The atoms that are involved in radioactive decay are called isotopes.

There are a number of ways that this can happen and when it does, the atom is forever changed.However, we generally refer to isotopes of a particular element (e.g., Rubidium-87 (Pb)).The number associated with an isotope is its atomic mass (i.e., protons plus neutrons).If they can begin to comprehend that it is random and spontaneous, they end up feeling less nervous about the whole thing.Radioactive decay involves the spontaneous transformation of one element into another.