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प्रश्न
उत्तर
Atom consists of three elementary particles, neutrons, protons and electrons. Neutron and protons form the central part of atom called nucleus where electrons revolve around this central part in orbits called electronic orbits.
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संबंधित प्रश्न
Arrange α, β, and γ rays in ascending order with respect to their
1) Penetrating power.
2) Ionising power
3) Biological effect
Write one use of cathode ray tube.
What do you mean by Mass number.
State two similarities and two dissimilarities between the γ-rays and X-rays.
Radioactive substances were found to give off three types of rays. Name them. How do they
(a) React to the magnetic field?
(b) React to the electric field?
(c) Act when different thickness of lead sheets is placed in their path?
A radioactive source emits three types of radiations.
Name the radiation which has the highest ionizing power.
What happens to the position of an element in the periodic table when it emits an alpha particle
State three ways of obtaining an electron-beam.
Heavy radioactive elements eventually turn into ______.
The count rate of activity of a radioactive sample of a very large population decreased from 1024 to 128 in 3 minutes. Then the rate of disintegration at the end of 5 minutes is ______.
