In the nuclear decay given below:
the particles emitted in the sequence are:
1. | \(\beta, \alpha, \gamma \) | 2. | \(\gamma, \beta, \alpha \) |
3. | \(\beta, \gamma, \alpha \) | 4. | \(\alpha, \beta, \gamma\) |
An atomic nucleus emits several and radiations and finally reduces to . It must have emitted:
1. 4 and 2
2. 6 and 4
3. 8 and 24
4. 4 and 16
After two alpha decays and four beta(-ve) decays, the atomic number:
1. | Decreases by 4 and mass number remains same. |
2. | Remains the same but the mass number increases by 4. |
3. | Remains the same but mass number decreases by 8. |
4. | Increases but mass number remains same. |
What happens to the mass number and the atomic number of an element when it emits \(\gamma\text{-}\)radiation?
1. | mass number decreases by four and atomic number decreases by two. |
2. | mass number and atomic number remain unchanged. |
3. | mass number remains unchanged while the atomic number decreases by one. |
4. | mass number increases by four and the atomic number increases by two. |
-particle consists of:
1. | 2 protons only |
2. | 2 protons and 2 neutrons only |
3. | 2 electrons, 2 protons, and 2 neutrons |
4. | 2 electrons and 4 protons only |
In nuclear reaction , \(\mathrm {B}\) denotes:
1. Electron
2. Positron
3. Proton
4. Neutron
The number of beta particles emitted by a radioactive substance is twice the number of alpha particles emitted by it. The resulting daughter is an:
1. Isobar of a parent.
2. Isomer of a parent.
3. Isotone of a parent.
4. Isotope of a parent.