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Q. No.The Rutherford α−α−particle experiment shows that most of the α−α−particles pass through almost unscattered while some are scattered through large angles. What information does it give about the structure of the atom?
| 1. | The atom is hollow. |
| 2. | The whole mass of the atom is concentrated in a small center called the nucleus. |
| 3. | The nucleus is positively charged. |
| 4. | All of the above |
Subtopic: Various Atomic Models |
86%
From NCERT
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If an alpha nucleus of energy 12mv212mv2 bombards a heavy nuclear target of charge ZeZe then the distance of the closest approach for the alpha nucleus will be proportional to:
| 1. | 1Ze1Ze | 2. | v2v2 |
| 3. | 1m1m | 4. | 1v41v4 |
Subtopic: Various Atomic Models |
84%
From NCERT
AIPMT - 2010
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In a Rutherford scattering experiment when a projectile of charge Z1Z1 and mass M1M1 approaches a target nucleus of charge Z2Z2
and mass M2M2 the distance of the closest approach is r0.r0. What is the energy of the projectile?
| 1. | Directly proportional to M1×M2M1×M2 |
| 2. | Directly proportional to Z1Z2Z1Z2 |
| 3. | Inversely proportional to Z1Z1 |
| 4. | Directly proportional to the mass M1M1 |
Subtopic: Various Atomic Models |
84%
From NCERT
NEET - 2009
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When an α-α- particle of mass mm moving with velocity vv bombards a heavy nucleus of charge ZeZe, its distance of closest approach from the nucleus depends on mm as:
1. 1√m1√m
2. 1m21m2
3. mm
4. 1m1m
1. 1√m1√m
2. 1m21m2
3. mm
4. 1m1m
Subtopic: Various Atomic Models |
83%
From NCERT
NEET - 2016
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In an α-α-particle scattering experiment, the number of particles scattered per minute in a direction perpendicular to the direction of incident particles is 40.40. What will be the number of particles scattered at an angle of 60∘60∘ per minute?
| 1. | 145145 | 2. | 160160 |
| 3. | 172172 | 4. | 157157 |
Subtopic: Various Atomic Models |
70%
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A beam of fast-moving alpha particles was directed towards a thin film of gold. The parts A′,B′, and C′ of the transmitted and reflected beams corresponding to the incident parts A,B and C of the beam, are shown in the adjoining diagram. The number of alpha particles in:
| 1. | B′ will be minimum and in C′ maximum |
| 2. | A′ will be the maximum and in B′ minimum |
| 3. | A′ will be minimum and in B′ maximum |
| 4. | C′ will be minimum and in B′ maximum |
Subtopic: Various Atomic Models |
68%
From NCERT
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What was Rutherford's atom according to classical theory?
1. Electrostatically stable
2. Electrodynamically unstable
3. Semi-stable
4. Stable
1. Electrostatically stable
2. Electrodynamically unstable
3. Semi-stable
4. Stable
Subtopic: Various Atomic Models |
60%
From NCERT
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An electron is moving around the nucleus of a hydrogen atom in a circular orbit of radius r. What is the coulomb force →F between the two? (where,K=14πϵ0)
1. Ke2r2ˆr
2. −Ke2r3ˆr
3. Ke2r3→r
4. −Ke2r3→r
1. Ke2r2ˆr
2. −Ke2r3ˆr
3. Ke2r3→r
4. −Ke2r3→r
Subtopic: Various Atomic Models |
55%
From NCERT
AIPMT - 2003
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Whose atomic model describes electrons being embedded in a gel of positive charge?
| 1. | Dalton's model |
| 2. | Bohr's model |
| 3. | Thomson's model |
| 4. | Rutherford's model |
Subtopic: Various Atomic Models |
67%
From NCERT
NEET - 2016
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In Bohr's model if the atomic radius of the first orbit is r0, then what will be the radius of the third orbit?
| 1. | r09 | 2. | r0 |
| 3. | 9r0 | 4. | 3r0 |
Subtopic: Bohr's Model of Atom |
87%
From NCERT
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