What are the units of a half-life?
The units of half-life are time.
The units of half-life are time. The half-life is the length of time that it takes for half of an initial sample to undergo a change. Usually this is the radio-active decay of a specific atomic weight of an element. For example, the half-life of Uranium-238 is 4.46 billion years.
The formula for half-life which gives the number of remaining atoms after a time,