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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
Give the following a suitable word/phrase
Arrangement of electrons in the shells of an atom.
Define the term Atomic number.
What are the two main parts of which an atom is made of?
Tick the most appropriate answer
β-particles are actually a stream of
- protons
- electrons
- neutrons
- none of these
WRITE SHORT ANSWER
What is the number of neutrons present in a potassium atom ?
Compare a proton and a neutron in respect of mass and charge.
The particle not present in an ordinary hydrogen atom is :
State its one drawback of Rutherford’s atomic model.
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.
Write down the names of the particles represented by the following symbols and explain the meaning of superscript and subscript numbers attached.
`""_1"H"^1`, `""_0"n"^1`,`""_(-1)"e"^0`
