By: Nur Aina Binti Shukri404/13176

Physics

Topics:

Subtopics:UNDERSTANDING THE USES OF RADIOISOTOPES.

CONCEPT MAP

radioactivity

Nucleus of atom

Protons

Neutrons

Proton numbersNucleon number

Nuclide notation

isotopes

Radioactive decay

Radiation

detectors

Half-life

Decay

curve

Radioisotopes

Example of

radioisotopes

Application of radioisotopes

Nuclear energy

Atomic mass unit (a.m.u)

Nuclear

fission

Nuclear

fusion

FUNDAMENTALS OF RADIOISOTOPES

Isotopes that are not stable and go through radioactive decay are known as RADIOISOTOPES.

Radioisotopes exist naturally. Radioisotopes have a wide

range of applications including medicine, agriculture, archaeology and industry

Stable isotopes

radioisotopes

Carbon-12 Carbon-14

Sodium-23 Sodium-24

Colbalt-59 Colbalt-60

Lead-207 Lead-210

Example of radioisotopes and their stable isotopes

APPLICATION OF RADIOISOTOPES IN VARIOUS FIELD

Field Isotopes application.

Medicine provide information about the function of the specific organs or treat disease. Cobalt-16 use to kill cancer cell without surgery in patients. Iodine-131 are injected into patients to detect malfunction of thyroid glands.

 Agriculture

Radioisotopes are also used to kill pests and parasites and to control the ripening of fruits. The metabolism of phosphorus in plants can be studied using phosphate fertilisers that contains phosphorus-32.

Archaeology

The amount of carbon-14 left in a decayed plant or animal can be used to tell its age. Carbon dating uses carbon-14 to c

Industries γ-rays can used to detect faults. Water can be made radioactive by dissolving some radioactive salt contains sodium-24. β-particles emitted are detected by a GM tube. α-particles from polonium-2l0 is used to neutralise static charge in photographic plates.

VIDEO TIME.http://www.youtube.com/watch?v=E4B94zCY4ok

http://www.youtube.com/watch?v=5oUagoF_viQ

QUESTION!1. X and Y are two isotopes. Which of these statements about X and Y is correct?

I. X and Y have the same proton numbers.II. X and Y have different numbers.III. There are more neutrons in an atom of Y than in an atom of X.

A. I and II onlyB. I and III onlyC. II and III onlyD. I,II and III

2. In a nuclear reactor, the neutrons produced are slowed down by the...

A. Concrete shieldB. Control rodsC. Graphite moderator.D. Fuel rods.

3. Radioactive waste is harmful to human being because..

A. It can explode if not handled with the correct procedure.

B. It emits radiation with a long half-lifeC. It remains very hot for a long peroid of time.D. It can leak out of containers.

4. Which of the following statements is true for all the three radioactive emission, i.e alpha particles, beta particles and gamma rays?

A. All the three radioactive emissions are stopped by a thick layer of aluminium.

B. All the three radioactive emissions are deflected by magnetic field.

C. All the three radioactive emissions are deflected by electric field.

D. All the three radioactive emissions are capable of ionising the air.

5.Radioisotopes in agriculture....choose the correct answer.....

Answer

Radioisotopes

Use in agriculture

A Cobalt-60 Kill cancer cells.

B Phosphorus-32

To determine the metabolism of phosphorus in plants

C Carbon-14 To estimate age of fossils and artefacts. 

D Iodine-131 Study the uptake by the thyroid glands.

6. Which of the particles is used to initiate the fission of a nucleus of uranium-235

A. High energy electronB. Slow moving neutronC. Fast moving protonD. Fast moving neutron

ANSWER

1. A2. C3. B4. D5. B6. B

PICTURES OF RADIOACTIVE.

Effect of radioactive!