True or False Statements :
Half-life period of a radioactive substance can be changed by using some suitable catalyst.

True or False Statements : A fraction f(1) of a radioactive sample...

True or False Statements : In a radioactive element the fraction of...

True or False Statements : The S.I. unit of activity is Curie (Ci).

True or False Statements : 90% of a radioactive sample is left undec...

Half-life for certain radioactive element is 5 min. Four nuclei of tha...

True or False Statements : 5 alpha and 4 beta^(-) are emitted during...

True or False Statements : The ratio t(1//2) //t(7//8) for a first o...

Classify each of the following nuclides as either "beta(.(-1)^(0)beta)...

Which of the following are radioacitve? a. .(48)Cd^(114) b. .(49)...

Consider the following nuclear reactions : I .(7)^(14)N+.(2)^(4)Hera...

The activity of the radioactive sample drops to (1/64)^(th) of its o...

The half life period of .(53)I^(125) is 60 days. What % of radioactivi...

At any given time a piece of radioactive material (t(1//2)=30 days) c...

An isotope of Potassium .(19)^(40) K has a half life of 1.4 xx 10^(9...

At a given instant there are 25% undecayed radioactive nuclei in a s...

Calculate the energy released in joules and MeV in the following nucle...

A sample of U^(238) ("half life" = 4.5 xx 10^(9)yr) ore is found to co...

Calculate the age of a vegetarian beverage whose tritium content is on...

Ac^(227) has a half life of 22 year . The decay follows two parallel p...