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 )

atoms of same elements having different mass number

atoms of different elements having same mass number

atoms of same elements having same mass number

atoms of different elements having same number of neutrons

EASY

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In a neutral atom, which atomic sub-particles are equivalent?

$p = proton n = neutron e^{+} = positron e^{-} = electron$

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Important Questions on Atomic Structure

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been:

EASY

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

Select the correct statements from the following :

A. Atoms of all elements are composed of two fundamental particles.
B. The mass of the electron is $9.10939 \times 10^{- 31} kg$ .
C. All the isotopes of a given element show same chemical properties.
D. Protons and electrons are collectively known as nucleons.
E. Dalton's atomic theory, regarded the atom as an ultimate particle of matter.

Choose the correct answer from the options given below:

EASY

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

Which of the following is the correct unit of angular momentum of an electron in an orbital of an atom ?

EASY

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

In Millikan's oil drop experiment, the forces acting on the oil drop are?

EASY

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

The number of times the comparative mass of a neutron is heavier than an electron is:

EASY

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

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

EASY

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

Which of the following conclusions could not be derived from Rutherford's

α

-particle scattering experiment:

EASY

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

An element with mass number

181

contains

32 %

more neutrons as compared to protons. What is the symbol of that element?

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

The relation between the stopping potential

(V_{0})

and frequency

(v)

is correctly represented in [

ϕ =

Work function]

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

The correct increasing order of the electronegativity is

EASY

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

Hydrogen has three isotopes

(A), (B)

and

(C) .

If the number of neutron(s) in

(A), (B)

and

(C)

respectively, are

(x), (y)

and

(z),

the sum of

(x), (y)

and

(z)

EASY

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

Arrange the following particles in an increasing order of values of

e / m

ratio: electron

(e),

proton

(p),

neutron

(n)

and

α

-particle

(α) -

EASY

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

The number of electrons, protons and neutrons in a species are equal to

10, 11

and

12

respectively. The proper symbol-of the species is

EASY

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

A particular station of All India Radio, New Delhi, broadcasts on a frequency of

1, 368 kHz

(kilo Hertz). The wavelength of the electromagnetic radiation emitted by the transmitter is [speed of light,

c = 3.0 \times 10^{8} {ms}^{- 1}

]

EASY

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

The number of protons, neutrons and electrons in

_{71}^{175} Lu

, respectively, are

HARD

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

Consider a hypothetical case in which the charge of a proton is twice as that of an electron. Using this hypothetical case, how many protons

(P),

neutrons

(N)

and electrons

(E)

would a neutral

{}^{23}{Na}

atom contain?

EASY

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

Isotopes are

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

The sum of the total number of neutrons present in protium, deuterium and tritium is

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

Among the following, the correct statement about cathode ray discharge tube is

EASY

Chemistry>Physical Chemistry>Atomic Structure>Sub-atomic Particles

The fundamental particles present in the nucleus of an atom are

In a neutral atom, which atomic sub-particles are equivalent? p=proton n=neutron e+=positron e-=electron

Important Questions on Atomic Structure

Learn and Prepare for any exam you want !

In a neutral atom, which atomic sub-particles are equivalent?

$p = proton n = neutron e^{+} = positron e^{-} = electron$