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प्रश्न
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उत्तर
Artificial radioactive substances can be produced by bombarding lighter nuclides with alpha particles, protons and neutron. The radioactive substances produces in this manner are called radioisotopes.
Radioisotopes can be used as:
(i) Rays from Radium produce satisfactorily improvement in skin diseases.
(ii) Radioactive Sulphur S35 helps to study advantages and disadvantages of fungicides.
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संबंधित प्रश्न
Name the unit in which the work function of a metal is expressed.
A radioactive source emits three types of radiations. Name them.
(i) Name the radiations which are charged.
(ii) Name the radiations which are most penetrating.
(iii) Name the radiations which travel with the speed of light.
(iv) Name the radiations which have the largest mass.
In the following fig. shows a radioactive source S in a thick lead container. The radiations pass through an electric field between the plates P and Q. Complete the diagram to show the paths of α , β and γ radiations.
Why is the source S placed in a thick lead container?
A radioactive source emits three types of radiations.
Name the radiation which has the highest ionizing power.
How is a zinc sulphide screen affected when a cathode ray beam strikes it?
Explain, why radium paint, consisting of zinc sulphide and a trace of radium salt, glows in the dark?
Heavy radioactive elements eventually turn into ______.
The activity of a certain radionuclide decreases to 15 percent of its original value in 10 days. What is its half life?
[ln (0.15) = -1.9]
A radioctive sample decays `7/8` times its original quantity in 15 minutes. The half-life of the sample is ______.
