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प्रश्न
Compare an electron and a proton in respect of mass and charge.
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उत्तर
The relative mass of a proton is 1u, as the mass of the proton is almost same as that of a hydrogen atom. The relative mass of an electron is (1/1840) u, as the mass of an electron is 1/1840th of the mass of a hydrogen atom.
A proton is positively charged, whereas an electron is negatively charged.
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WRITE SHORT ANSWER
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State whether the following statement is true or false :
The anode rays obtained from all the gases consist of positively charged particles called protons.
State its one drawback of Rutherford’s atomic model.
Define the term Mass number.
Explain in brief – Goldstein’s experiment which led to the discovery of the proton.
Draw a neat labelled diagram representing an atom. Name the three sub-atomic particles in the atom and represent them symbolically showing the mass and charge of each. State where the sub-atomic particles are present in the atom.
What is meant by the term subatomic particles?
