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प्रश्न
Give the following a suitable word/phrase.
The sum of the number of protons and neutrons of an atom.
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उत्तर
Mass number
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संबंधित प्रश्न
Fill in the blank
Neutrons are .......................... particles having mass equal to that of protons.
FILL IN THE BLANK
Gases become good conductors of electricity under ........ (low/high) pressure and .............. (low/high) voltage electrical discharge.
WRITE SHORT ANSWER
What is the charge on a neutron ?
ANSWER IN DETAIL
Name the three subatomic particles. How are they different from each other ?
Fill in the blank of the following statement :
The electron has _________ charge, the proton has _________ charge, and the neutron has _________ charge.
Name the three fundamental particles of an atom.
State its one drawback of Rutherford’s atomic model.
Define the term Valence shell.
With reference to the discovery of the structure of an atom, explain in brief – William Crookes experiment for the discovery of cathode rays, followed by – J.J. Thomsons experiment pertaining to the constituents of the cathode rays. State which sub-atomic particle was discovered from his experiment.
Select the correct answer from the choice in the bracket to complete the sentence:
A ________ is a sub-atomic particle with no charge and unit mass.
