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प्रश्न
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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
A radioactive substance is oxidized. Will there be any change in the nature its radioactivity? Give a reason for your answer
In a cathode ray tube, what is the function of anode?
Why is a cathode ray tube evacuated to a low pressure?
State any two precautions to be taken while handling radioactive substances.
A nucleus `""_11^24Na` emits a beta particle to change into Magnesium (Mg)
(i) Write the symbolic equation for the process.
(ii) What are numbers 24 and 11 called?
(iii) What is the general name of `""_12^24Mg `with respect to `""_11^24Na` ?
What do you mean by electron emission?
How is a cathode ray beam affected while passing through a magnetic field?
A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
Mention four properties of Becquerel rays.
Unit of radioactivity is _______
