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प्रश्न
What are the observations of the experiment done by Rutherford in order to determine the structure of an atom?
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उत्तर
Following were the observations made by Rutherford:
- Most of the alpha particle passed straight through the foil without any deflection from their path.
- A small fraction of them were deflected from their original path by small angles.
- Only a few particles bounced back
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संबंधित प्रश्न
Write true or false for the following statement
The central pad of the atom is called nucleus.
Give the following a suitable word/phrase
The sub-atomic particle with negative charge and negligible mass.
Mention briefly the salient features of Dalton’s atomic theory (five points)
FILL IN THE BLANK
The electrons revolving in shells close to the nucleus are called ................... electrons.
Tick the most appropriate answer.
Which of the following scientists observed that cathode rays consists of negatively charged particles?
- John Dalton
- J J Thomson
- James Chadwick
- Democritus
Compare an electron and a proton in respect of mass and charge.
Name the sub-atomic particle whose charge is 0.
Name the three fundamental particles of an atom.
Define the term Valence shell.
If an atom ‘A’ has an atomic number of eleven, state the number of protons and electrons it contains.
