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प्रश्न
Explain in brief the experimental proof which led to the discovery of –
Atomic nucleus
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उत्तर
Discovery of Atomic Nucleus: Lord Rutherford in 1911 directed alpha particles (42He) towards gold foil. The deflection of the alpha particles was observed and concluded that there was a nucleus at the centre of atom which was positively charged dense very small space (solid) called the nucleus.
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संबंधित प्रश्न
Fill in the blank
The ..........................of an atom is very hard and dense.
Draw the diagrams representing the atomic structures of the following: Nitrogen.
FILL IN THE BLANK
The protons and neutrons are held firmly in the nucleus by strong .........................
FILL IN THE BLANK
Nuclear energy can be used to make ..........................
Tick the most appropriate answer.
Which of the following is used as a coolant in nuclear reactor?
- liquid sodium
- liquid nitrogen
- cadmium steel rods
- plutonium
TRUE \ FALSE
Uranium-235 and uranium-238 both undergo nuclear fission.
On the basis of Rutherford's model of an atom, which subatomic particle is present in the nucleus of an atom?
Which part of atom was discovered by Rutherford?
State one major drawback of Rutherford's model.
Where is the nucleus of an atom situated?
