Percentage of α -particles which are deflected back in direction of projection of α -particle (in Rutherford's experiment) is 5 × 10 - x . What will be the value of x ? NOTE: A very few α–particles ( ~ 1 in 20 , 000 ) bounced back.

By the observations of Rutherford's scattering experiment: A very few α - particles ( ~ 1 in 20 , 000 ) were deflected back, i.e., were deflected by an angle of nearly 180 ° . Thus, the percentage of total alpha particles that showed this behaviour = 1 20000 × 100 = 5 × 10 - 3 % By comparing this value with the one given in the question, x = 3 .

Percentage of α -particles which are deflected back in direction of projection of α -particle (in Rutherford's experiment) is 5 × 10 - x . What will be the value of x ? NOTE: A very few α–particles ( ~ 1 in 20 , 000 ) bounced back.

By the observations of Rutherford's scattering experiment: A very few α - particles ( ~ 1 in 20 , 000 ) were deflected back, i.e., were deflected by an angle of nearly 180 ° . Thus, the percentage of total alpha particles that showed this behaviour = 1 20000 × 100 = 5 × 10 - 3 % By comparing this value with the one given in the question, x = 3 .

MEDIUM

JEE Main

IMPORTANT

Earn 100

Percentage of $α$ -particles which are deflected back in direction of projection of $α$ -particle (in Rutherford's experiment) is $5 \times 10^{- x} .$ What will be the value of $x ?$

NOTE: A very few α–particles ( $~ 1$ in $20, 000$ ) bounced back.

Important Questions on Atomic Structure

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 8

The radius of the nucleus of

Al

x \times 10^{- 15} m .

Give the value of

x

in the form of the nearest integer such as

2.2

should be reported as

2

and

2.8

should be reported as

3 .

(Mass number of

Al = 27

)

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 9

In two elements ${}_{Z_{1}}A^{M_{1}}$ and ${}_{Z_{2}}B^{M_{2}}, M_{1} \neq M_{2}$ and $Z_{1} \neq Z_{2}$ but $M_{1} - Z_{1} = M_{2} - Z_{2} .$ These elements are

EASY

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 10

Moseley's equation for the determination of wavelength of

X

-rays is (

ν =

frequency of wave,

Z =

nuclear charge,

a

and

b

are constants)

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 11

Light of wavelength

λ

, shines on a metal surface with intensity

X

, and the metal emits

Y

electrons per second of average energy

Z

. What will happen to

Y

and

Z

X

is doubled?

HARD

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 12

Number of

α

-particles scattered by an angle

θ

in Rutherford's experiment is

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 13

The ejection of the photoelectron from the silver metal in the photoelectric effect experiment can be stopped by applying a voltage of

0.35 V

when the radiation

256.7 nm

is used. Calculate the work function for silver metal.

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 14

The approximate radius of a

H

atom is

0.05 nm

, and that of the proton is

1.5 \times 10^{- 15} m

. Assuming both the hydrogen atom and the proton to be spherical, calculate the fraction of the space in an atom of hydrogen that is occupied by the nucleus.

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 15

One quantum is absorbed per gaseous molecule of

{Br}_{2}

for converting into

Br

atoms. If light absorbed has a wavelength

5000 \overset{\circ}{A},

calculate the energy required to break bonds in

kJ {mol}^{- 1} .

Percentage of α-particles which are deflected back in direction of projection of α-particle (in Rutherford's experiment) is 5×10-x. What will be the value of x? NOTE: A very few α–particles (~1 in 20,000) bounced back.

Important Questions on Atomic Structure

Learn and Prepare for any exam you want !

Percentage of $α$ -particles which are deflected back in direction of projection of $α$ -particle (in Rutherford's experiment) is $5 \times 10^{- x} .$ What will be the value of $x ?$

NOTE: A very few α–particles ( $~ 1$ in $20, 000$ ) bounced back.