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

Earn 100

The ratio of specific charge of a proton and an $α -$ particle is:

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Important Questions on Structure of Atom

EASY

Chemistry>Physical Chemistry>Structure of Atom>Cathode Rays and Positive Rays

B e^{2 +}

is isoelectronic with which of the following ions?

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Cathode Rays and Positive Rays

Which of the following pairs of ions is isoelectronic and isostructural?

EASY

Chemistry>Physical Chemistry>Structure of Atom>Cathode Rays and Positive Rays

The isoelectronic set of ions is:

EASY

Chemistry>Physical Chemistry>Structure of Atom>Cathode Rays and Positive Rays

Which of the following are isoelectronic species?

I. $\overset{+}{C} H_{3}$

II. ${NH}_{2}^{-}$

III. ${NH}_{4}^{+}$

IV. ${NH}_{3}$

EASY

Chemistry>Physical Chemistry>Structure of Atom>Cathode Rays and Positive Rays

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

EASY

Chemistry>Physical Chemistry>Structure of Atom>Cathode Rays and Positive Rays

The number of protons, neutrons and electrons in

_{71}^{175} Lu

, respectively, are

EASY

Chemistry>Physical Chemistry>Structure of Atom>Cathode Rays and Positive Rays

Among the following species which option contains all isoelectronic species?

EASY

Chemistry>Physical Chemistry>Structure of Atom>Cathode Rays and Positive Rays

From the following pairs of ions which one is not an iso-electronic pair?

EASY

Chemistry>Physical Chemistry>Structure of Atom>Cathode Rays and Positive Rays

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