- 1(current)
Q. No.Which statement about the Rutherford model of the atom is not true?
| 1. | There is a positively charged centre in an atom called the nucleus. |
| 2. | Nearly all the mass of an atom resides in the nucleus. |
| 3. | The size of the nucleus is the same as that of the atom. |
| 4. | Electrons occupy the space surrounding the nucleus. |
Subtopic: Various Atomic Models |
90%
Level 1: 80%+
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In a Rutherford scattering experiment, when a projectile of charge \(Z_1\) and mass \(M_1\) approaches a target nucleus of charge \(Z_2\) and mass \(M_2\), the distance of the closest approach is \(r_0\). The energy of the projectile is:
| 1. | directly proportional to \(M_1M_2\). |
| 2. | directly proportional to \(Z_1Z_2\). |
| 3. | inversely proportional to \(Z_1\). |
| 4. | directly proportional to mass \(M_1\). |
Subtopic: Various Atomic Models |
84%
Level 1: 80%+
AIPMT - 2009
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Given below are two statements:
| Statement I: | The scattering of α-particles at large angles is primarily due to the atomic nucleus. |
| Statement II: | The atomic nucleus is very heavy in comparison to electrons. |
| 1. | Statement I is correct and Statement II is incorrect. |
| 2. | Statement I is incorrect and Statement II is correct. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Both Statement I and Statement II are incorrect. |
Subtopic: Various Atomic Models |
83%
Level 1: 80%+
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As compared to \(^{12}\mathrm{C}\) atoms, \(^{14}\mathrm{C}\) atom has:
| 1. | two extra protons and two extra electrons. |
| 2. | two extra protons but no extra electrons. |
| 3. | two extra neutrons but no extra electrons. |
| 4. | two extra neutrons and two extra electrons. |
Subtopic: Various Atomic Models |
80%
Level 1: 80%+
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An alpha nucleus of energy \({1 \over 2 } mv^2\) bombards a heavy nuclear target of charge \(Ze\). Then the distance of the closest approach for the alpha nucleus will be proportional to:
1. \(v^2\)
2. \(1/ v^4\)
3. \(1 /m\)
4. \(1/Ze\)
1. \(v^2\)
2. \(1/ v^4\)
3. \(1 /m\)
4. \(1/Ze\)
Subtopic: Various Atomic Models |
79%
Level 2: 60%+
NEET - 2010
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- 1(current)
Q. No.
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