7/8 of the original mass of a radioactive substance decays in 30 min. What is the half life of the radioactive substance ?

Define half life of a radioactive substance.

Define half-life of a radioactive substance.

If 8g of a radioactive substance decays into 0.5 g in 1 h, then the half-life of the substance is

After 20 min, the amount of certai radioactive substance disintegrate was 15/16 original amount. What is the half-life ofg the radioactive substance?

The activity of a radioactive substance becomes from 8000 Bq to 1000 Bq in 12 days . What is the half-life of the radioactive substance ?

A radioactive substance decays to (3)/(4) th of original value in 2h. The half-life of the substance is

Define half-life of a radioactive substance. Derive the expression for half life of a radioactive substance.

At t=0 , number of radioactive nuclei of a radioactive substance are x and its radioactivity is y. Half-life of radioactive substance is T. Then,