Which of the following is used as a moderator in nuclear reactors?
1. Plutonium
2. Cadmium
3. Heavy water
4. Uranium
1. | \({}_{7}^{13}\mathrm{N}\) | 2. | \({}_{5}^{10}\mathrm{B}\) |
3. | \({}_{4}^{9}\mathrm{Be}\) | 4. | \({}_{7}^{14}\mathrm{N}\) |
The mass of \({}_{7}^{15}\mathrm{N}\) is \(15.00011\) amu, mass of \({}_{8}^{16}\mathrm{O}\) is \(15.99492\) amu and \(m_p = 1.00783\) amu. Determine the binding energy of the last proton of \({ }_{8}^{16}\mathrm{O}\).
1. \(2.13\) MeV
2. \(0.13\) MeV
3. \(10\) MeV
4. \(12.13\) MeV
The power obtained in a reactor using \(\mathrm{U}^{235}\) disintegration is \(1000\) kW. The mass decay of \(\mathrm{U}^{235}\) per hour is:
1. \(1\) microgram
2. \(10\) microgram
3. \(20\) microgram
4. \(40\) microgram
In the nuclear reaction: \(\mathrm{X}\left(n,\alpha\right){}_{3}^{7}\mathrm{Li}\) the term \(\mathrm{X}\) will be:
1. | \({}_{5}^{10}\mathrm{B}\) | 2. | \({}_{5}^{9}\mathrm{B}\) |
3. | \({}_{5}^{11}\mathrm{B}\) | 4. | \({}_{2}^{4}\mathrm{He}\) |
In a radioactive decay process, the negatively charged emitted -particles are:
1. | The electrons present inside the nucleus. |
2. | The electrons produced as a result of the decay of neutrons inside the nucleus. |
3. | The electrons produced as a result of collisions between atoms. |
4. | The electrons orbiting around the nucleus. |