\({ }_{82}^{290} X \xrightarrow{\alpha} Y \xrightarrow{e^{+}} Z \xrightarrow{\beta^{-}} P \xrightarrow{e^{-}} Q\)
In the nuclear emission stated above, the mass number and atomic number of the product \(Q\) respectively, are:
1. \(286,80\)
2. \(288,82\)
3. \(286,81\)
4. \(280,81\)
Subtopic:  Types of Decay |
 63%
From NCERT
NEET - 2024
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An excited heavy nucleus \(^A_Z \mathrm{X}\) emits radiations in the following sequence:
\(^A_Z \mathrm{X}\rightarrow ^{A-4}_{Z-2}\mathrm{D_1}\rightarrow ^{A-4}_{Z-1}\mathrm{D_2}\rightarrow ^{A-8}_{Z-3}\mathrm{D_3}\rightarrow ^{A-8}_{Z-4}\mathrm{D_4}\rightarrow ^{A-8}_{Z-4}\mathrm{D_5}\)
where \(Z,A\) are the atomic and mass number of element \(\mathrm{X},\) respectively. The possible emitted particles or radiations in the sequence, respectively are: 
1. \(e^+, \alpha, e^-, \alpha , \gamma \)
2. \(e^-, \alpha, e^+, \alpha , \gamma \)
3. \(\alpha ,e^-, \alpha, e^+, \gamma \)
4. \(\alpha ,e^+, \alpha, e^-, \gamma \)
Subtopic:  Types of Decay |
 64%
From NCERT
NEET - 2024
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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. \(_{10}^{22}\textrm{Ne}\)
Subtopic:  Types of Decay |
 65%
From NCERT
NEET - 2022
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A radioactive nucleus \(_{\mathrm{Z}}^{\mathrm{A}}\mathrm{X}\) undergoes spontaneous decay in the sequence \(_{\mathrm{Z}}^{\mathrm{A}}\mathrm{X}\rightarrow \mathrm{B}_{\mathrm{Z-1}}\rightarrow \mathrm{C}_{\mathrm{Z-3}}\rightarrow \mathrm{D}_{\mathrm{Z-2}}\) where \(\mathrm{Z}\) is the atomic number of element \(\mathrm{X}\). The possible decay particles in the sequence are: 
1. \(\beta^{+}, ~\alpha, ~\beta^{-}\) 2. \(\beta^{-}, ~\alpha, ~\beta^{+}\)
3. \(\alpha, ~\beta^{-},~\beta^{+}\) 4. \(\alpha, ~\beta^{+},~\beta^{-}\)
Subtopic:  Types of Decay |
 70%
From NCERT
NEET - 2021
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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.
Subtopic:  Types of Decay |
 83%
From NCERT
NEET - 2020
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