(B) The initial nucleus is ${ }_{Z}^{A} X$.After the first $\alpha$-decay, the nucleus $P$ is formed: ${ }_{Z-2}^{A-4} P$.After the $\beta$-decay of $

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(B) The initial nucleus is ${ }_{Z}^{A} X$.After the first $\alpha$-decay, the nucleus $P$ is formed: ${ }_{Z-2}^{A-4} P$.After the $\beta$-decay of $P$, the nucleus $Q$ is formed: ${ }_{Z-2+1}^{A-4} Q = { }_{Z-1}^{A-4} Q$.After the second $\alpha$-decay of $Q$, the nucleus $R$ is formed: ${ }_{Z-1-2}^{A-4-4} R = { }_{Z-3}^{A-8} R$.The number of neutrons $N$ in a nucleus ${ }_{Z'}^{A'} R$ is given by $N = A' - Z'$.For nucleus $R$, $A' = A-8$ and $Z' = Z-3$.Therefore, $N = (A-8) - (Z-3) = A - 8 - Z + 3 = A - Z - 5$.

Class 12 Physics Nuclei Properties of Alpha, Beta and Gamma Rays and Decay Process

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The nucleus ${ }_{Z}^{A} X$ undergoes the series of reactions given below:
${ }_{Z}^{A} X \stackrel{\alpha \text {-decay }}{\longrightarrow} P \stackrel{\beta \text {-decay }}{\longrightarrow} Q \stackrel{\alpha \text {-decay }}{\longrightarrow} R$
The number of neutrons in the nucleus $R$ is

TS EAMCET 2023 All TS EAMCET

A
$A-Z-4$
B
$A-Z-5$
C
$A-Z-8$
D
$A-Z-9$

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Nuclei

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Properties of Alpha, Beta and Gamma Rays and Decay Process

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In which radioactive disintegration does a neutron dissociate into a proton and an electron?

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In the nuclear decay sequence given below:
$_Z{X^A} \to {}_{Z + 1}{Y^A} \to {}_{Z - 1}{K^{A - 4}} \to {}_{Z - 1}{K^{A - 4}}$
the particles emitted in the sequence are:

MediumAIPMT 1993

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$\alpha$-decay of a parent nucleus $X$ results in a daughter nucleus $Y$. If $m_x, m_y$ and $m_a$ are the masses of the parent nucleus, the daughter nucleus and the $\alpha$-particle respectively, then the net kinetic energy gained in the process is:

EasyTS EAMCET 2023

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Which of the following cannot be emitted by radioactive substances during their decay?

EasyAIEEE 2003

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Originally, radioactive beta decay was thought to be a decay of a nucleus with the emission of electrons only (Case $I$). However, in addition to the electron, another (nearly) massless and electrically neutral particle is also emitted (Case $II$). Based on the figure below, which of the following is correct?

KVPY 2019

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The nucleus ${ }_{Z}^{A} X$ undergoes the series of reactions given below:${ }_{Z}^{A} X \stackrel{\alpha \text {-decay }}{\longrightarrow} P \stackrel{\beta \text {-decay }}{\longrightarrow} Q \stackrel{\alpha \text {-decay }}{\longrightarrow} R$The number of neutrons in the nucleus $R$ is

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In which radioactive disintegration does a neutron dissociate into a proton and an electron?

In the nuclear decay sequence given below:$_Z{X^A} \to {}_{Z + 1}{Y^A} \to {}_{Z - 1}{K^{A - 4}} \to {}_{Z - 1}{K^{A - 4}}$the particles emitted in the sequence are:

$\alpha$-decay of a parent nucleus $X$ results in a daughter nucleus $Y$. If $m_x, m_y$ and $m_a$ are the masses of the parent nucleus, the daughter nucleus and the $\alpha$-particle respectively, then the net kinetic energy gained in the process is:

Which of the following cannot be emitted by radioactive substances during their decay?

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The nucleus ${ }_{Z}^{A} X$ undergoes the series of reactions given below:
${ }_{Z}^{A} X \stackrel{\alpha \text {-decay }}{\longrightarrow} P \stackrel{\beta \text {-decay }}{\longrightarrow} Q \stackrel{\alpha \text {-decay }}{\longrightarrow} R$
The number of neutrons in the nucleus $R$ is

In the nuclear decay sequence given below:
$_Z{X^A} \to {}_{Z + 1}{Y^A} \to {}_{Z - 1}{K^{A - 4}} \to {}_{Z - 1}{K^{A - 4}}$
the particles emitted in the sequence are: