InterviewSolution
Saved Bookmarks
| 1. |
What is radio-activity? Name two radioactive substances. |
|
Answer» “The phenomenon of some substances to give out spontaneous emission of invisible radiation which can penetrate through some thickness is called RADIOACTIVITY” and these substances are called RADIOACTIVE SUBSTANCES. Name of RADIOACTIVE SUBSTANCES : URANIUM, RADIUM, THORIUM, POLONIUM and ACTINIUM. |
|