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प्रश्न
Explain in brief – Goldstein’s experiment which led to the discovery of the proton.
उत्तर
Discovery of – Protons
- Discovery – Constituent of positive rays i.e. particles that contain – protons.
Experiment:
- Goldstein used a modified cathode ray tube with a perforated cathode.
- He observed a new type of rays produced from the anode passing through the holes of the perforated cathode. These rays were called anode rays.
Conclusion:
- Anode rays or positive rays consist of positively charged particles now called – protons.
- The positive rays were affected by electric & magnetic fields but – in a direction opposite to that of cathode rays.
- Thus with the discovery of the positive particles – proton was initiated.
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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.
The sum of the number of protons and neutrons of an atom.
Multiple Choice Questions
The outermost shell of an atom is known as
Explain the rule with example according to which electrons are filled in various energy levels
FILL IN THE BLANK
Gases become good conductors of electricity under ........ (low/high) pressure and .............. (low/high) voltage electrical discharge.
FILL IN THE BLANK
The γ-rays are............................ radiations, like light.
ANSWER IN DETAIL
Name the three subatomic particles. How are they different from each other ?
Name the sub-atomic particle whose charge is 0.
Draw a neat labelled diagram representing an atom. Name the three sub-atomic particles in the atom and represent them symbolically showing the mass and charge of each. State where the sub-atomic particles are present in the atom.
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.
