For example the medical sciences refer to the. T_frac 1 2 is the half-life of the decaying quantity tau is a positive number called the mean lifetime of the decaying quantity lambda is a positive number called the decay constant of the decaying quantity. The half-life of a drug is an estimate of the period of time that it takes for the concentration or amount in the body of that drug to be reduced by exactly one half 50.
When you know the half life of a rxn then you can determine the amount of product formed and we all know time is t 12 is half so t12 is just a symbol for half life.
6 votes See 1 more reply. The half-life equation for a zero-order reaction is latext_ frac 1 2frac A_ 0 2k latex. 6 9 3 l. 2 to calculate the age years.