A nucleus represented by the symbol has:
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 |
Which of the following pairs of nuclei are isotones?
1.
2.
3.
4.
The binding energy of deuteron is 2.2 MeV and that of is 28 MeV. If two deuterons are fused to form one then the energy released is:
1. | 25.8 MeV | 2. | 23.6 MeV |
3. | 19.2 MeV | 4. | 30.2 MeV |
The binding energies of the nuclei A and B are Ea and Eb respectively. If three atoms of the element B fuse to give one atom of element A and an energy Q is released, then Ea, Eb and Q are related as:
1. Ea – 3Eb = Q
2. 3Eb – Ea = Q
3. Ea + 3Eb = Q
4. Eb + 3Ea = Q
If M (A, Z), , and denote the masses of the nucleus , proton, and neutron respectively in units of u (1 u = 931.5 MeV/c2) and BE represents its binding energy in MeV, then:
1. | \(M(A, Z)=Z_p+(A-Z) M_n-B E / c^2\) |
2. | \(\mathrm{M}(\mathrm{A}, \mathrm{Z})=\mathrm{ZM}_{\mathrm{p}}+(\mathrm{A}-\mathrm{Z}) \mathrm{M}_{\mathrm{n}}+\mathrm{BE}\) |
3. | \(M(A, Z)=Z_p+(A-Z) M_n-B E\) |
4. | \(\mathrm{M}(\mathrm{A}, \mathrm{Z})=\mathrm{ZM}_{\mathrm{p}}+(\mathrm{A}-\mathrm{Z}) \mathrm{M}_{\mathrm{n}}+\mathrm{BE} / \mathrm{c}^2\) |
The binding energy per nucleon of deuterium and helium atom is 1.1 MeV and 7.0 MeV. If two deuterium nuclei fuse to form a helium atom, the energy released is:
1. 19.2 MeV
2. 23.6 MeV
3. 26.9 MeV
4. 13.9 MeV
In the reaction
,
if the binding energies of are respectively a, b, and c (in MeV), then the energy in (MeV) released in this reaction is:
1. c + a - b
2. c - a - b
3. a + b + c
4. a + b - c
The mass of a nucleus is 0.042 u less than the sum of the masses of all its nucleons. The binding energy per nucleon of the nucleus is near:
1. 4.6 MeV
2. 5.6 MeV
3. 3.9 MeV
4. 23 MeV
The Binding energy per nucleon of \(^{7}_{3}\mathrm{Li}\) and \(^{4}_{2}\mathrm{He}\) nucleon are \(5.60~\text{MeV}\) and \(7.06~\text{MeV}\), respectively. In the nuclear reaction \(^{7}_{3}\mathrm{Li} + ^{1}_{1}\mathrm{H} \rightarrow ^{4}_{2}\mathrm{He} + ^{4}_{2}\mathrm{He} +Q\), the value of energy \(Q\) released is:
1. \(19.6~\text{MeV}\)
2. \(-2.4~\text{MeV}\)
3. \(8.4~\text{MeV}\)
4. \(17.3~\text{MeV}\)