PDF chapter test TRY NOW

1. When and where was the first nuclear reactor built?
 
The first-ever nuclear reactor was built by Fermi in , in .

2. Give the SI unit of radioactivity.
 
 is the SI unit of radioactivity.

3. Which material protects us from radiation?
 
While working in the hazardous area,  aprons and  gloves should be worn. These materials are used to shield us from the effects of radiation.