Fission of nuclei is possible because the binding energy per nucleon in them:
1. | decreases with the mass number at low mass numbers |
2. | increases with the mass number at low mass numbers |
3. | decreases with the mass number at high mass numbers |
4. | increases with the mass number at high mass numbers |
Nuclear – fission is best explained by:
1. Liquid droplet theory
2. Yukawa - meson theory
3. Independent particle model of the nucleus
4. Proton-proton cycle
emitted one particles, then it will become:
1.
2.
3.
4. None of these
When X → \(N_{7}^{14}\) + 2\(\beta^{-} \) then the number of neutrons in X will be:
1. 3
2. 5
3. 7
4. 9
1. | \( m_3=\left|m_1-m_2 \right|\) | 2. | \( m_3<\left ( m_1+m_2 \right ) \) |
3. | \( m_3>\left ( m_1+m_2 \right ) \) | 4. | \( m_3=\left ( m_1+m_2 \right ) \) |
1. | \(Z\) protons and \(A-Z\) neutrons |
2. | \(Z\) protons and \(A\) neutrons |
3. | \(A\) protons and \(Z-A\) neutrons |
4. | \(Z\) neutrons and \(A-Z\) protons |
MP denotes the mass of a proton and Mn that of a neutron. A given nucleus, of binding energy B, contains Z protons and N neutrons. The mass M(N, Z) of the nucleus is given by:
(c is the velocity of light )
1. M(N, Z) = NMn + ZMP + Bc2
2. M(N, Z) = NMn + ZMP – B/c2
3. M(N, Z) = NMn + ZMP + B/c2
4. M(N, Z) = NMn + ZMP – Bc2
If a radioactive element emitted one α and one β-particle, then the mass number of the daughter element is:
1. decreased by 4
2. increased by 4
3. decreased by 2
4. increased by 2
Which of the following are suitable for the fusion process?
1. | light nuclei |
2. | heavy nuclei |
3. | the element must be lying in the middle of the periodic table |
4. | middle elements which are lying on the binding energy curve |