The activity of a radioactive sample

Staements I: To determine the age of certain very old oragnic samples, dating of the sample with radioactive isotpes having larger half-life is a better choice than with radioactive isotopes having smaller half-lives. Staements II: The activity of a radioactive sample having smaller half-life is negligibly small after a very long time and hence makes it next to impossible to get dtected.

Staements I: To determine the age of certain very old oragnic samples, dating of the sample with radioactive isotpes having larger half-life is a better choice than with radioactive isotopes having smaller half-lives. Staements II: The activity of a radioactive sample having smaller half-life is negligibly small after a very long time and hence makes it next to impossible to get dtected.

The activity fo a radioactive sample decrases t 1//3 of the orginal acticity. A_(0) in a period of 9 year. After 9 year more, its activity will be:

The curve between the activity A of a radioactive sample and the number of active atoms N is.

What do you mean by 'activity' of a radioactive sample ?

In Fig. X represents time and Y represent activity of a radioactive sample. Then the activity of sample, varies with time according to the curve

The activity of the radioactive sample drops to (1/64)^(th) of its original value in 2 hr find the decay constant (lambda) .

The activity of the radioactive sample decreases form I_0 to I_0/3 in 9 years. After 9 years more the sample shall decrease form (I_0)/(3) to

If the activity of radioactive sample drops to 1//32 of its initial value in 7.5 hr. Half life will be -