Menu
  • call
  • chat
  • call
Header Add 1

Header Add 1

Rev. Notes > IGCSE > Radioactivity
 
 
Previous Topic Radioactivity Next Topic

Topics
 

Radioactivity and radioactive - rays

Experiment to distinguish three kinds of radioactive rays Background radiations
Alpha rays Beta rays Gamma - rays
Radioactive decay

Half - life

Safety precautions

Isotopes

The radioactive isotopes Uses of radioactive isotopes
Uses of radioactive isotopes - Medicines Uses of radioactive isotopes - Industries Uses of radioactive isotopes - Agriculture
Uses of radioactive isotopes - Carbon dating Artificial radioactivity
 

Uses of radioactive isotopes - Medicines

Radio-isotopes have helped in understanding the basic working of many of the internal organs and vital metabolic processes. They have also helped in the diagnosis and cure of many complicated diseases.

The radio-isotopes have also played a vital role in determining the affectivity and absorption of medicine in various parts of the body.

Radio phosphorus-32 and radio iodine-131 are used as tracer, to trace out the path of an element in the body or plant, animal or human-being. The position of the radio-isotope in the body can be detected from outside the body by the radiation it emits. This allows some diagnosis about internal organs to be made without surgery.

Iodine-131 is used for the body of thyroid garland.

Phosphorus-32 is used to locate precisely the position of tumor in the brain.

Radio sodium has been extremely useful in tracing the blood circulation in the body.

Radio strontium has been found effective in the treatment of internal hemorrhages and wounds.

Radio phosphorus has been effective for treating leukemia. Radiation emitted by it destroys the excess production of white blood corpuscles.

Certain types of cancers also respond to treatment by radiation emitted by radio-isotopes.

It has been found that certain types of cancerous cell absorb radio-isotope radiation preferentially. This helps in locating the cancerous portions of the body precisely, which can then be treated by bombardment by radiation from radio-isotopes. Radio cobalt-60 has been widely used to treat cancerous tumors inside the body.

Radiation in low dosages can also be used for sterilizing bandages, instruments and other surgical accessories.

In the twentieth century, radio-isotopes have brought about a revolution in the diagnosis and treatment of many diseases thought incurable earlier. Their role will continue to grow.

------------------------------

 

------------------------------

 
Add Comment | FAQs | Report Error | | | Share on Twitter
 
View Comments on this Chapter - Total Comments (16)
 
Chandiya Said :
THis is awesone and really really useful
 
  01/11/16 07:16 PM
   
Muhammad Hasnain Said :

Great work, please keep it up!

 
  10/07/15 04:07 PM
   
yas Said :
it says that the 3 types of radioactive rays can be distinguished from one another by a simple experiment but what is the experiment?
 
  13/04/15 11:10 PM
   
Sc Said :
Btw this is a great website :-)
 
  01/04/14 08:12 PM
   
Sc Said :
Where are the figures?
 
  01/04/14 08:00 PM
   
jjanedan Said :
Manufacturer of slip rings. We commit to the development, design, and marketing of high-quality. Main products include slip ring, ring slip, slip rings,slipring,rotary joint and so on. collector rings http://www.electricslipring.com/
 
  15/11/13 09:20 AM
   
julia kobeissi Said :
in isotopes , you said in thr figure below and theres no figure ?
 
  05/06/13 12:17 PM
   
Ryouta Said :
What is the charge on Beta particles then????? Coz Alpha have 2 charge, and Gamma are neautral...
 
  21/03/13 10:27 AM
   
kainat Said :
all the radium formed when the earth condensed out of the suns atmosphere should have decayed away to an unmeasurably small amount by now. why?
 
  02/09/12 03:09 PM
   
burhanuddin Said :
i have my mocks on monday < will dis help me?
------------------------------------------------------------------------------------- Admin Replied:

Definitely, it will help you.

 
  11/08/12 09:45 PM
   
Mohammad Said :
Can you give the definition for ionization
 
  13/05/12 08:44 PM
   
Frank Said :
It says "Carbon-1" somewhere in the beginning. Do rectify it.
------------------------------------------------------------------------------------- Admin Replied:

Thanks for your comments. Now that is rectified.

 
  24/01/12 07:12 PM
   
Sagnik Said :
If elements with the atomic mass of >84 are the only elements that undergo radioactivity, then explain how Carbon-14 can undergo radioactive decay.
------------------------------------------------------------------------------------- Admin Replied:

Stability of a nucleus depends upon the neutron/proton ratio. If this ratio is too small or large, the nucleus will be unstable. The neutron/proton ratio in carbon-14 is too large, making the nucleus sufficiently unstable that it emits a beta particle, converting to nitrogen-14.

Same situation of unstability is there in the elements having atomic number greater than 82.smiley

 
  24/01/12 07:01 PM
   
Swaira Said :
undefined
 
  01/11/11 07:14 PM
   
Abdullah Said :
What is the speed of light?
------------------------------------------------------------------------------------- Admin Replied:

Speed of light is 299 792 458 m / s

 
  31/10/11 06:41 PM
   
Hadaya Said :
What is the mass of the proton and alpha particle?
------------------------------------------------------------------------------------- Admin Replied:

Mass of a proton = 1.66 x 10^-27kg Mass of neutron = 1.6749 x 10^(-27) kg The rest mass of the alpha particle (which is equal to the mass of two protons and two neutrons) amounts to 6.64424 x 10^-27 kg.

 
  31/10/11 06:13 PM
 

 

footer 1

   
Footer Add 1

    Footer Add 2

Signup for our Newsletter

About us:

A team of committed professionals providing free online resources of physics for the learners of IGCSE/AS/ A Level .....

footer-image