How many alpha and beta particles are emitted when Uranium U 92 238 decays to lead Pb 82 206 ?

8 alpha particles and 6 beta particles

3 alpha particles and 5 beta particles

6 alpha particles and 4 beta particles

4 alpha particles and 5 beta particles

MEDIUM

JEE Main

IMPORTANT

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Important Questions on Atoms and Nuclei

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 24 June 2022 Shift 1>Q 97

Nucleus

A

is having mass number

220

and its binding energy per nucleon is

5.6 MeV

. It splits in two fragments

B

and

C

of mass numbers

105

and

115

. The binding energy of nucleons in

B

and

C

6.4 MeV

per nucleon. The energy

Q

released per fission will be:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 24 June 2022 Shift 2>Q 98

In Bohr's atomic model of hydrogen, let

K, P

and

E

are the kinetic energy, potential energy and total energy of the electron respectively. Choose the correct option when the electron undergoes transitions to a higher level :

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 24 June 2022 Shift 2>Q 99

A sample contains

10^{- 2} kg

each of two substances

A

and

B

with half lives

4 s

and

8 s

respectively. The ratio of their atomic weights is

1 : 2

. The ratio of the amounts of

A

and

B

after

16 s

\frac{x}{100}

. The value of

x

is _____ .

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 25 June 2022 Shift 1>Q 100

The ratio for the speed of the electron in the

3^{rd}

orbit of

{He}^{+}

to the speed of the electron in the

3^{rd}

orbit of hydrogen atom will be :

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 25 June 2022 Shift 2>Q 101

Which of the following figure represents the variation of

\ln (\frac{R}{R_{0}})

with

\ln A

(if

R =

radius of a nucleus and

A =

its mass number)

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 26 June 2022 Shift 2>Q 102

A radioactive nucleus can decay by two different processes. Half-life for the first process is

3.0

hours while it is

4.5

hours for the second process. The effective halflife of the nucleus will be

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 26 June 2022 Shift 1>Q 103

How many alpha and beta particles are emitted when Uranium

{{}_{92}U}^{238}

decays to lead

{}_{82}{Pb}^{206}

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 27 June 2022 Shift 1>Q 104

A hydrogen atom in its ground state absorbs

10.2 eV

of energy. The angular momentum of electron of the hydrogen atom will increase by the value of (Given, Planck's constant

= 6.6 \times 10^{- 34} J s

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Important Questions on Atoms and Nuclei

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