Question

Define the activity of
and write its SI unit
Radio active material​

Answer 1

Answer:

Activity of radioactive substance is defined as the number of disintegration takes place in the given sample per second.

Its SI unit is Becquerel (Bq).

1 Bq is one disintegration per second

Answer 2

Explanation:

Activity of radioactive material is the number of disintegrations taking place at its core at any given moment.

It also represents the number of radiations emitted.

SI unit of radioactive material : becquerel ( Bq )