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प्रश्न
Define the term Mass number.
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उत्तर
Mass number refers to the sum of the number of protons and neutrons present in the nucleus of an atom and denoted by A Mass number = Number of protons + Number of neutrons.
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संबंधित प्रश्न
Write true or false for the following statement
The maximum number of electrons in the first shell can be 8.
Give the following a suitable word/phrase.
Protons and neutrons present in the nucleus.
Multiple Choice Questions
The outermost shell of an atom is known as
Fill in the blank of the following statement :
The electron has _________ charge, the proton has _________ charge, and the neutron has _________ charge.
Compare an electron and a proton in respect of mass and charge.
State its one drawback of Rutherford’s atomic model.
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.
State how electrons are distributed in an atom. Explain in brief the rules which govern their distribution.
What is meant by the term subatomic particles?
