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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
Give the following a suitable word/phrase.
The electrons present in the outermost shell.
Give the following a suitable word/phrase.
The smallest unit of an element which takes part in a chemical reaction.
Multiple Choice Questions
number of valence electrons present in magnesium is
Define the term Atomic number.
Explain the rule with example according to which electrons are filled in various energy levels
FILL IN THE BLANK
The electrons revolving in shells close to the nucleus are called ................... electrons.
ANSWER IN DETAIL
Write a note on valence shell.
Which of the following statement is always correct?
Explain how the modern atomic theory contradicted Dalton’s atomic theory.
Explain in brief – Goldstein’s experiment which led to the discovery of the proton.
