Use of radioactivity.

Define radioactivity. Write down the characteristics of radioactivity.

When a nucleus in an atom undergoes a radioactive decay, the electronic energy levels of the atom - (A) Do no change for any type of radioactivity. (B) Change for alpha and beta -radioactivity but not for gamma -radioactivity. (C) Change for alpha -radioactivity but not for others. (D) Change for beta -radioactivity but not for others.

Explain the use of radioactive isotopes with specified examples.

The phenomenon of radioactivity was discovered by

What is the unit of radioactivity?

What is the unit of radioactivity in SI unit?

In an experiment, the carbon dioxide available to a C_(3) plant was labelled with a radioactive isotope and the amount of radioactivity in the chloroplast was measured.As photosynthesis proceeded, in which of the following molecules did the radioactivity first appear ?

Define radioactivity

The element which shows radioactivity is