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प्रश्न
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.
Give one example of isobars.
Give a scientific explanation.
When the radiation coming out from a certain radioactive substance is passed through an electric field, marks are found at three places on the photographic plate placed in its path.
Give the relative ionizing power of α, β and γ radiations.
What is nucleus of an atom? Compare its size with that of the atom. Name its constitutents. How is the number of these constituents determined by the atomic number its atomic model.
Define atomic number of an element.
What do you mean by electron emission?
State any two uses of cathode rays.
Which part of the atom undergoes a change in the process of radioactive decay?
The half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be ______.
