The half-life of tritium is _________

What is meant by the statement that the half-life of radium is 1622 years ?

The half-life of a reaction is halved as the initial concentration of the reactant is doubled. The order of reaction is:

Starting from the rate law of a first order reaction, show that the half-life of the reaction is independent of the initial reactant concentration.

Starting from the rate law of a first-order reaction how that the half-life of the reaction is independent of the initial reactant concen-tration.

The half-life of a radio-isotope is 3 min. What fraction of the number of these isotopes in a sample would remain intact after 15 min ?

At a given initial concentration of reactant , the half-life of a reaction is found to be 50min . If the initial concentration is quadrupled , then half-life of the reaction becomes 25min . The order of the reaction is -

A radioactive substance is subject to the law of natural decay (dv)/(dt)=-kv , where v is the volume of the substance at time t and k is a positive constant. The half-life of the substance is the time it takes for half the substance to disappear. Calcualte the half-life if 20 % of the substance disappeared in 15 years.

The half-life of a radioactive substance is 1 y. After 2 y, what will the amount of the substance that will be disintegrated?

The half life of a given reaction is doubled as the initial concentration of a reactant is doubled. The order of the reaction will be