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प्रश्न
Compare an electron, a proton and a neutron in respect of their relative masses and charges.
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उत्तर
Relative masses :relative mass of a neutron is 1u, that of a proton is also 1u and that of an electron is (1/1840) u.
Charge: Charge of a proton is +1, that of an electron is –1 and that of a neutron is zero.
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संबंधित प्रश्न
Write true or false for the following statement
The central pad of the atom is called nucleus.
Explain the rule with example according to which electrons are filled in various energy levels
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In an atom, the last shell containing electrons is called its..................shell.
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The γ-rays are............................ radiations, like light.
Tick the most appropriate answer.
Which of the following scientists observed that cathode rays consists of negatively charged particles?
- John Dalton
- J J Thomson
- James Chadwick
- Democritus
Name the negatively charged particle present in the atoms of all the elements.
Fill in the blank of the following statement :
The electron has _________ charge, the proton has _________ charge, and the neutron has _________ charge.
Select the correct answer from the choice in the bracket to complete the sentence:
An element ‘X’ has six electrons in its outer or valence shell. Its valency is __________.
What is meant by the term subatomic particles?
