Radio -activity|Radio-active नाभिक|Artificial- रेडियो सक्रियता|Atomic Structure|e का संक्रमण

Radio active wastes at lower doses cause

Radio-active dating is a technique which can be used to measure

The value of energy of activation for radio active decay is

Radio-activity can be detected in hydrogn due to the presence of

Select the correct statements a) Passive immunity is slow & takes time to give full effective response. b) In active immunity readymade antibodies are directly given to protect body againts active infections. c) Passive artificial immunity is used for treatment of disease. d) Active artificial immunity is basis of vaccination.

A radio active sample contains 600 radio active atoms. Its half life period is 30 minutes. The no. of radio active atoms remaining, if the decay accurs for 90 minutes is

If a meristematic cell is placed in a medium containing radio active thymidine, radioactivity will be first observed in :-