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प्रश्न
What do you mean by Atomic number
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उत्तर
Atomic number is the number of protons present in the nucleus. As number of protons is equal to the number of electrons so atomic number also gives the number of electrons in an atom.
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संबंधित प्रश्न
Answer the following questions based on a hot cathode ray tube.
What will happen to the beam when it passes through the electric field?
An element `""_ZS^A` decays to `""_85R^222` after emitting 2 α particles and 1 β particle.
Find the atomic number and atomic mass of the element S.
A radioactive substance is oxidized. Will there be any change in the nature its radioactivity? Give a reason for your answer
State the energy conversion taking place in a cathode ray tube
In a cathode ray tube state:
(i) the purpose of covering cathode by thorium and carbon.
(ii) the purpose of the fluorescent screen.
(iii) how is it possible to increase the rate of emission of electrons.
What do you mean by Mass number.
Define the term radioactivity.
How is a cathode ray tube used to convert an electrical signal into a visual signal?
A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
88Ra226 experiences three α - decay. Find the number of neutrons in the daughter element.
