If you do not understand this equation, do not worry because I will explain everything you need to know. Where t is time, N(t) is the amount of isotope remaining at time t, N 0 is the initial amount of the isotope present, t 1/2 is the half life, and = t 1/2/ln(2). The equation describing radioactive decay is How are scientists able to figure out what the half life of an atom is when a half life can be billions of years? Do you ever completely get rid of radioactive atoms? How are we able to age the oldest rock that is 4 billion years old?
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