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प्रश्न
What do you understand by the term radioactivity?
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उत्तर
The process of self, spontaneous and random emission of a or P and y radiations from the nucleus of elements of atomic number higher than 82, is called radioactivity.
संबंधित प्रश्न
Arrange α, β, and γ rays in ascending order with respect to their
1) Penetrating power.
2) Ionising power
3) Biological effect
State the energy conversion taking place in a cathode ray tube
What happens to the position of an element in the periodic table when it emits an alpha particle
Why should a radioactive substance not be touched by hands?
What are the types of emission?
How is a cathode ray beam affected while passing through an electric field?
In a cathode ray tube state. How is it possible to increase the rate of emission of electrons.
State three ways of obtaining an electron-beam.
The half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be ______.
In the following atoms, which one is a radioisotope? Give one use of this isotope.
O16, C14, N14, He4
