MEDIUM
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When the nucleus that undergoes disintegration during a nuclear disintegration is called a parent nucleus and the nucleus which remains after the disintegration is called daughter nucleus. This law is known as Soddy and Fajan radioactive law.

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Important Questions on Nuclear Physics

MEDIUM
A nucleus X captures a β particle and then emits a neutron and γ ray to form Y. X and Y are:-
HARD
Mass number of a radioactive element is 232 and its atomic number is 90. When this element undergoes certain nuclear reactions, it transforms into an isotope of lead with a mass number 208 and an atomic number 82. Determine the number of alpha and beta decay that can occur.
HARD
Which one(s) of the following processes- alpha emission, beta emission, positron emission, electron capture- cause an increase in the atomic number?
EASY
What will an alpha particle change into when it absorbs (i) one electron (ii) two electrons?
MEDIUM
State Soddy and Fajan’s displacement law.
EASY

In a nuclear reaction given below, a nucleus X22688 changes to another nucleus Y.

X22688Y+α+Energy

What is atomic number and mass number of Y?

HARD
How many alpha and beta particles are emitted when uranium nucleus U23892  decays to lead Pb20682 ?
MEDIUM
Which one(s) of the following processes- alpha emission, beta emission, positron emission, electron capture- cause emission of an X-ray in every case?
HARD
Which one of the following nuclear transformation is (np) type?
HARD
If an atom of U235, after absorption of a slow neutron undergoes fission to form an atom of Xe139 and an atom of Sr94, what other particles are produced and how many?
HARD
Show by equations, the effect on the proton number Z and mass number A of the parent nucleus brought about by the two types of radioactive decay.
EASY

For which of the following radiations is the path not affected by electric field and why?

α-rays, β-rays, γ-rays.

EASY
Can a radioactive substance emit both α and β rays simultaneously?
MEDIUM
The isotope of U23892 decays by alpha emission to an isotope of thorium Th. The thorium isotope decays by beta emission to an isotope of protactinium (Pa). Write down the equation to represent these two nuclear changes.
MEDIUM
Which one(s) of the following processes- alpha emission, beta emission, positron emission, electron capture- cause a decrease in the atomic number?
MEDIUM

Give scientific explanation:

When the radiation coming out from certain radioactive substance is passed through an electric field, marks are found at three places on the photographic plate placed in its path.

EASY
How many alpha and beta particles are emitted when Uranium nucleus  92U238 decays to lead 82U206?
EASY
A radioactive element XAZ  first emits two β particles and then an alpha particle and the resulting nucleus can be represented by YPQ . What are the values of P and Q in terms of A and Z?