Consider the following nuclear reactions: I. 7 14 N + He 2 4 ⟶ O 8 17 + X II. Be 4 9 + H 2 4 ⟶ He 6 12 + Y Then,

X is a proton and Y is a neutron

X is a neutron and Y is a protron

EASY

Earn 100

In the following nuclear reaction ${}_{6}C^{11} \to {}_{5}B^{11} - β^{-} - x, x$ stands for

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Important Questions on Structure of Atoms and Nuclei

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

In the nuclear reaction

{}_{6}{C^{11}} \to_{9} B^{11} + β^{+} + X^{-}

, what does

X

stand for?

MEDIUM

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

A nucleus with mass number

184

initially at rest emits an

α -

particle. If the

Q

value of the reaction is

5.5 MeV,

calculate the kinetic energy of the

α -

particle.

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

The binding energy per nucleon of

{}_{3}L i^{7}

and

{}_{2}{He}^{4}

nuclei are

5.60 MeV

and

7.06 MeV,

respectively. Then, in the nuclear reaction

{{}_{3}L}^{7} + {{}_{1}H}^{1} ⟶ {}_{2}{He}^{4} + {}_{2}{He}^{4} + Q,

the value of

Q .

the energy released, is

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

The electric charge of the neutrino is given by

MEDIUM

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

On the bombardment of neutron with boron,

α

-particle is emitted. The product nuclei formed is

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

When

{}_{3}^{7}{Li}

nuclei are bombarded by protons, the resultant nuclei is

{}_{4}^{8}{Be}

. The emitted particles will be

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

Which of the following nuclear reactions is possible?

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

If the energy released in the fission of one nucleus is

3.2 \times 10^{- 11} J

, then number of nuclei required per second in a

16 kW

power plant is

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

In the given nuclear reaction

${}_{4}^{9}B e + {}_{2}^{4}H e ⟶ {}_{6}^{12}C + X$ ,

$X$ represents....

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

The missing one $(?)$ in the following reaction is ${}^{9}B e + {}^{4}H e \to 3^{4} H e + ?$

MEDIUM

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

Thermal neutrons at the room temperature have an energy of

0.025 eV .

Half-life of neutrons is

10

minutes. If a source gives out a beam of neutrons, at what distance from the source, half the neutrons would have decayed?

MEDIUM

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

A nucleus, initially at rest, breaks up into two nuclear fragments with their radii in the ratio

2 : 1 .

Then their velocities will be in the ratio

MEDIUM

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

The

Q

-value of a nuclear reaction and kinetic energy of the projectile particle,

K_{p}

are related as

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

Consider the following nuclear reactions:

I. ${}_{7}^{14} N + {}_{2}^{4}{He} ⟶ {}_{8}^{17}O + X$

II. ${}_{4}^{9}{Be} + {}_{2}^{4}H ⟶ {}_{6}^{12}{He} + Y$

Then,

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

A nuclear reaction is given as

{}_{2}{He}^{4} + {}_{Z}{X^{A}} \to {}_{Z + 2}{Y^{A + 3}} + A

. The particle

A

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

The equation

4_{1}^{1} H^{+} \to {}_{2}^{4}{He}^{2 +} + 2 e^{- 1} + 26 MeV

represents.

EASY

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

The scientific principle that forms the basis of the Tokamak technology is

HARD

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

A nucleus of mass

M

emits

γ

-ray photon of frequency

v

. The loss of internal energy by the nucleus is: [Take

c

as the speed of electromagnetic wave]

MEDIUM

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

For nuclei with mass number close to

119

and

238

, the binding energies per nucleon are approximately

7.6 MeV

and

8.6 MeV

, respectively. If a nucleus of mass number

238

breaks into two nuclei of nearly equal masses, what will be the approximate amount of energy released in the process of fission?

HARD

Physics>Modern Physics>Structure of Atoms and Nuclei>Radioactivity

Suppose a

{}_{88}^{226}{R a}

nucleus at rest and in ground state undergoes

α

-decay to a

{}_{86}^{222}{R n}

nucleus in its excited state. The kinetic energy of the emitted

α

particle is found to be

4.44 M e V . {}_{86}^{222}R n

nucleus then goes to its ground state by

γ

-decay. The energy of the emitted

γ

-photon is _______

k e V,

[Given: atomic mass of

_{88}^{226} R a = 226.005 u,

atomic mass of

_{86}^{222} R n = 222.000 u,

atomic mass of

α

particle

= 4.000 u, 1 u = 931 M e V / c^{2}, c

is speed of the light]

In the following nuclear reaction C116→B115-β--x, x stands for

Important Questions on Structure of Atoms and Nuclei

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In the following nuclear reaction ${}_{6}C^{11} \to {}_{5}B^{11} - β^{-} - x, x$ stands for