Match List ‐ I (Experiment performed) with List ‐ II (Phenomena discovered/associated)and select the correct option from the options given below the lists List-I List-II ( a ) Davisson and Germer experiment i Wave nature of electrons b Millikan's oil drop experiment ii Charge of an electron c Rutherford experiment iii Quantisation of energy levels d Franck-Hertz experiment ( iv ) Existence of the nucleus

( a ) ‐ ( i ) , ( b ) ‐ ( ii ) , ( c ) ‐ ( iv ) , ( d ) ‐ ( iii )

( a ) ‐ ( iii ) , ( b ) ‐ ( iv ) , ( c ) ‐ ( i ) , ( d ) ‐ ( ii )

( a ) ‐ ( iv ) , ( b ) ‐ ( iii ) , ( c ) ‐ ( ii ) , ( d ) ‐ ( i )

( a ) ‐ ( i ) , ( b ) ‐ ( ii ) , ( c ) ‐ ( iii ) , ( d ) ‐ ( iv )

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The number $(N)$ of scattered $α$ -particles detected versus scattering angle $(θ)$ graph for $α$ -particle scattering experiment (Rutherford) is best represented by

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Important Questions on Atomic Physics

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Physics>Modern Physics>Atomic Physics>Atomic Model

Particle used in the Rutherford's scattering experiment to deduce the structure of atoms

HARD

Physics>Modern Physics>Atomic Physics>Atomic Model

Consider the following statement:

(I) All isotopes of elements have the same number of neutrons.

(II) Only one isotope of an element can be stable and non-radioactive.

(III) All elements have isotopes.

(IV) All isotopes of Carbon can form chemical compounds with Oxygen $- 16$ .

The correct option regarding an isotope is:

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Physics>Modern Physics>Atomic Physics>Atomic Model

Match List $‐ I$ (Experiment performed) with List $‐ II$ (Phenomena discovered/associated)and select the correct option from the options given below the lists

	List-I		List-II
$(a)$	Davisson and Germer experiment	$(i)$	Wave nature of electrons
$(b)$	Millikan's oil drop experiment	$(ii)$	Charge of an electron
$(c)$	Rutherford experiment	$(iii)$	Quantisation of energy levels
$(d)$	Franck-Hertz experiment	$(iv)$	Existence of the nucleus

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Physics>Modern Physics>Atomic Physics>Atomic Model

α

-particle after passing through potential difference of

V

volt collides with a nucleus. If the atomic number of the nucleus is

Z

, then distance of closest approach is

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Physics>Modern Physics>Atomic Physics>Atomic Model

Discuss an experimental setup off Geiger -Marsden experiment of

α

- scattering.

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Physics>Modern Physics>Atomic Physics>Atomic Model

In Rutherford experiment, for head-on collision of

α -

particles with a gold nucleus, the impact parameter is

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Physics>Modern Physics>Atomic Physics>Atomic Model

The number of completely filled shells for the element

_{16} S^{32}

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Physics>Modern Physics>Atomic Physics>Atomic Model

The value of magnetic quantum number of the last electron of

" Na "

" is

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Physics>Modern Physics>Atomic Physics>Atomic Model

In Rutherford's experiment, a thin gold foil was bombarded by alpha particles. If Thomson's "Plum Pudding Model" of the atom were correct, what would have been the outcome of the experiment?

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Physics>Modern Physics>Atomic Physics>Atomic Model

\sqrt{d_{1}}

and

\sqrt{d_{2}}

are the impact parameters corresponding to scattering angles

60 °

and

90 °

respectively, when an

α

particle is approaching a gold nucleus. For

d_{1} = x d_{2}

, the value of

x

will be _____ .

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Physics>Modern Physics>Atomic Physics>Atomic Model

A beam of fast moving alpha particles were directed towards a thin film of Gold. The parts $A^{'}, B^{'}$ and $C^{'}$ of the transmitted and reflected beams corresponding to the incident parts $A, B$ and $C$ of the beam are shown in the adjoing diagram. The number of alpha particles in

Question Image

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Physics>Modern Physics>Atomic Physics>Atomic Model

In the Rutherford scattering, the number of scattered alpha particles per unit area striking a fluorescent screen at a given distance from a thin foil at an angle

θ

varies with kinetic energy

E

of the alpha particle as

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Physics>Modern Physics>Atomic Physics>Atomic Model

An alpha particle accelerated through

V

volts is fired towards a nucleus. It distance of closest approach is

r .

If a proton accelerated through the same potential is fired towards the same nucleus, its distance of closest approach will be

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Physics>Modern Physics>Atomic Physics>Atomic Model

A beam of electrons of energy E scatters from a target having atomic spacing of

1 Å

. The first maximum intensity occurs at

θ = 60 ° .

Then

E (in eV)

is........
(Planck's constant

h = 6.64 \times 10^{- 34} J s, 1 eV = 1.6 \times 10^{- 19} J,

electron mass

m = 9.1 \times 10^{- 31} kg

)

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Physics>Modern Physics>Atomic Physics>Atomic Model

The pair of atoms among the following having the same structure is

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Physics>Modern Physics>Atomic Physics>Atomic Model

In Rutherford nuclear model of an atom, for a dynamically stable orbit in hydrogen atom, the orbit radius varies with the velocity of the electron as

\frac{1}{v^{a}},

where

α

is,
(Ignore radiation due to motion of electric charge)

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Physics>Modern Physics>Atomic Physics>Atomic Model

Electrons behave like gas in J.J. Thompson experiment because they

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Physics>Modern Physics>Atomic Physics>Atomic Model

In 1911, the physical Ernest Rutherford discovered that atoms have a tiny, dense nucleus by shooting positively charged particles at a very thin gold foil. A key physical property which led Rutherford to use gold was that it was

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Physics>Modern Physics>Atomic Physics>Atomic Model

Who discovered the nucleus.

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Physics>Modern Physics>Atomic Physics>Atomic Model

The graph which depicts the results of Rutherford gold foil experiment with

α

-particles is:

θ :

Scattering angle

Y :

Number of scattered

α

-particles detected
(Plots are schematic and not to scale)

The number (N) of scattered α -particles detected versus scattering angle (θ) graph for α -particle scattering experiment (Rutherford) is best represented by

Important Questions on Atomic Physics

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The number $(N)$ of scattered $α$ -particles detected versus scattering angle $(θ)$ graph for $α$ -particle scattering experiment (Rutherford) is best represented by