physics – radioisotopes
TRANSCRIPT
SUBTOPIC : UNDERSTANDING THE USES OF RADIOISOTOPES
• Name : Nurul Syazwani Izzati Bt Khairi• Class : 409/509• Physics Teacher : Encik Abdul Hamid
Atoms of an element with the SAME NUMBER OF PROTONS but
DIFFERENT NUMBER OF NEUTRONS .
Have SAME CHEMICAL PROPERTIES because ….
• SAME number of electrons
Have DIFFERENT PHYSICAL PROPERTIES because ….
• DIFFERENT number of neutrons
Also called as RADIOACTIVE ISOTOPES
Some exists NATURALLY such as …
I. Hydrogen
II. Oxygen
III. Potassium
Others produces ARTIFICIALLY by
TRANSMUTATIONS in Nuclear Reactor such
as …I. Sodium
II. Iodine
III. Carbon
Medicine
Medicine
Industries AgricultureAgriculture Archaeology
• Enhance the efficient and sustainable use of soil-water-
nutrient resources
• Minimize effects of soil erosion and degradation
• Quantify the Biological Nitrogen Fixation
1. Which of the following radioisotopes is used in smoke detectors ?
A.Sodium-24B.Americium-241C. Cobalt-60D. Phosphorus-32
B. Americium-241
2. Understanding uses of radioactivity, briefly describe one of its use inMedicine , agriculture and industries .
Medicines
Iodine -131 is used to check the function of the thyroid gland.The patient is given an injection of iodine -131 to act as a tracer . The activity of the iodine -131 is detected and monitored at the throat of the patient.
Agriculture
To control pests . Gamma rays can kill bacteria . Gamma rays is used to cause infertility of agriculture pests and insects.
Industries
To determine water leakage in underground pipe using sodium-24
3. Two properties of sodium-24
which make it a suitable tracer to
detect pipe leakage ?
o It decays by emitting gamma rays which can penetrate the ground and underground pipes
o Its half life of 15 hours enables it to decay to a level which is harmless in short time