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Q. No.In the given nuclear reaction, the element \(\mathrm{X}\) is:
\({ }_{11}^{22} \mathrm{Na} \rightarrow \mathrm{X}+\mathrm{e}^{+}+\nu\)
1. \({ }_{12}^{22} \mathrm{Mg}\)
2. \({ }_{11}^{23} \mathrm{Na}\)
3. \({ }_{10}^{23} \mathrm{Ne}\)
4. \(_{10}^{22}\textrm{Ne}\)
\({ }_{11}^{22} \mathrm{Na} \rightarrow \mathrm{X}+\mathrm{e}^{+}+\nu\)
1. \({ }_{12}^{22} \mathrm{Mg}\)
2. \({ }_{11}^{23} \mathrm{Na}\)
3. \({ }_{10}^{23} \mathrm{Ne}\)
4. \(_{10}^{22}\textrm{Ne}\)
Subtopic: Types of Decay |
65%
From NCERT
NEET - 2022
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When a nucleus in an atom undergoes a radioactive decay, the electronic energy levels of the atom:
| 1. | do not change for any type of radioactivity |
| 2. | change for α and β -radioactivity but not for γ -radioactivity |
| 3. | change for α -radioactivity but not for others |
| 4. | change for β -radioactivity but not for others |
Subtopic: Types of Decay |
76%
From NCERT
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Tritium is an isotope of hydrogen whose nucleus triton contains 2 neutrons and 1 proton. Free neutrons decay into . If one of the neutrons in Triton decays, it would transform into He3 nucleus. This does not happen. This is because;
| 1. | triton energy is less than that of a He3 nucleus |
| 2. | the electron created in the beta decay process cannot remain in the nucleus |
| 3. | both the neutrons in Triton have to decay simultaneously resulting in a nucleus with 3 protons, which is not a He3 nucleus. |
| 4. | free neutrons decay due to external perturbations which is absent in Triton nucleus |
Subtopic: Types of Decay |
From NCERT
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Antineutrinos are emitted during:
1. \(\alpha\)-decay
2. \(\beta\)-decay
3. \(\gamma\)-decay
4. neutron emission
1. \(\alpha\)-decay
2. \(\beta\)-decay
3. \(\gamma\)-decay
4. neutron emission
Subtopic: Types of Decay |
83%
From NCERT
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Atomic number increases in:
| 1. | \(\alpha\text-\)decay. |
| 2. | \(\beta^{-}\text-\)decay. |
| 3. | \(\beta^{+}\text{-}\)decay. |
| 4. | \(K\text{-}\)electron capture. |
Subtopic: Types of Decay |
80%
From NCERT
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