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प्रश्न
Give the following a suitable word/phrase.
The smallest unit of an element which takes part in a chemical reaction.
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उत्तर
Atom
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संबंधित प्रश्न
Fill in the blank
The outermost shell of an atom is known as............................
Give the following a suitable word/phrase
The sub-atomic particle with negative charge and negligible mass.
Give the following a suitable word/phrase.
The electrons present in the outermost shell.
Name three fundamental particles of the atom. Give the symbol with charge, on each particle.
What are the observations of the experiment done by Rutherford in order to determine the structure of an atom?
Tick the most appropriate answer
β-particles are actually a stream of
- protons
- electrons
- neutrons
- none of these
WRITE SHORT ANSWER
What is an atom?
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.
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.
