Define half life period.

The decay constant for 6^(C^(14)) is 2.31xx 10^(-4) year-1 calculate the half life period.

Show that for a first order reaction the time required for 99.9% completion is about 10 times its half life period.

T is the half life period and T_a is the average life of a radioactive substance. Which of the following statement is correct ?

If the initial concentration of reactants in a certain reaction is doubled the half life period of the reaction doubles . The order of the reaction is :

A substance decomposes according to zero order kinetics . If the rate constant is k and initial concentration is a then half life period is :

For an nth order reaction the half life period t_(1//2) is proportional to (initial conc = C_(0)) :

If the half life period for a reaction in A is 100 min . How long will it take [A] to reach 25 % of its initial concentration ?

For the first order reaction the half life period is (if k is rate constant and a is initial concentration ) :