In the nucleus of ${}_{20}C a^{40}$ there are

Question

In the nucleus of ${}_{20}C a^{40}$ there are

A. 40 protons and 20 electrons

B. 20 protons and 40 electrons

C. 20 protons and 40 neutrons

D. 20 protons and 20 neutrons

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The possible values of l for an s orbital are

A. -1, +1

B. 0 to 2

C. -2 and + 1

D. 0

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Which of the following atoms has a non-spherical outermost orbital.

A. H

B. Li

C. Be

D. B

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The number of unpaired electrons in fluorine atoms is/are

A. 4

B. 2

C. 1

D. 0

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Argon is isoelectronic with

A. $M g^{+ +}$

B. $C l^{-}$

C. $B r^{-}$

D. $H^{+}$

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The relationship between energy of a radiation and its frequency was given by

A. Planck

B. Rutherford

C. Einstein

D. Joule

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The wavelength of an electron

A. is equal to that of light

B. remains constant with velocity

C. decreases with an increasing velocity

D. increases with an decreasing velocity

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Which of the following weighs the least?

A. 1 g of $C O_{2}$

B. 2 litres of $C O_{2}$ at N.T.P.

C. $3.01 \times 10^{11}$ molecules of $C O_{2}$

D. $3.01 \times 10^{22}$ atoms of carbon

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Mass of positron is the same to that of

A. proton

B. meson

C. electron

D. neutron

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The maximum number of electrons in a sub-energy level is equal to

A. $4 (2 l + 1)$

B. $2 (2 l + 1)$

C. $2 n^{2}$

D. $n^{3}$

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Charge on fundamental particle neutrino is

A. 0

B. +1

C. -1

D. None of these

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The corect set of quantum numbers for the impaired electron of fluorine atom is

A.

n	l	m
2	1	0

B.

n	l	m
2	1	1

C.

n	l	m
3	1	1

D.

n	l	m
3	0	0

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The size of nucleus is

A. $10^{- 12} m$

B. $10^{- 8} m$

C. $10^{- 15} m$

D. $10^{- 10} m$

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Davisson and Germer gave an experimental evidence for

A. wave nature of electron

B. particle nature of electron

C. particle nature of light

D. wave nature of light

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Isotopes have different

A. arrangement of electrons

B. no. of P and e'

C. no. of neutrons

D. no. of electrons

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The ion that is isoelectronic with CO is

A. $C N^{-}$

B. ${O_{2}}^{+}$

C. ${O_{2}}^{-}$

D. ${N_{2}}^{+}$

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The velocity of a photon is

A. dependent on its wavelength

B. dependent on its source

C. equal to cube of its amplitude

D. independent of its wavelength

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Which of the following has the highest mass?

A. Neutron

B. Alpha particle

C. Electron

D. Deuterium

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In an atom of hydrogen, which of the following orbitais has the lowest energy for an electron present in it?

A. 3r

B. 2p

C. 4p

D. 2s

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The fundamental particle that has least mass is

A. meson

B. alpha-particle

C. electron

D. neutron

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The exchange of particles considered responsible for keeping the nucleons together are

A. meson

B. electron

C. positron

D. neutron

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The atomic structure of an atom of an element is Is $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{6}$ . The element is

A. Cl-35

B. S-32

C. N-18

D. O-16

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Which elements is represented by the following electronic configuration?

A. Nitrogen

B. Oxygen

C. Fluorine

D. Neon

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If value of h is taken as $10^{- 34} k g m^{2} s e c^{- 1}$ , the de-Broglie wavelength of a particle of mass $10^{- 31}$ having velocity $10^{9} c m s e c^{- 1}$ is

A. 0.01 m

B. 2 nm

C. 0.1 nm

D. $15 Å$

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The atomic number of an element having the valence shell electronic configuration $4 s^{2} 4 p^{6}$ is

A. 35

B. 26

C. 23

D. 34

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Cathode rays contain a stream of

A. $n$

B. $r$

C. ${}_{+ 1}e^{0}$

D. ${}_{- 1}e^{0}$

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Electronic configuration of $C u^{+}$ is

A. $[A r] 3 d^{9}$

B. $[A r] 3 d^{10}$

C. $[A r] 3 d^{9} 3 s^{2}$

D. $[A r] 3 d^{7} 4 s^{1} 4 p^{1}$

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Charge on an electron was shown by

A. J. J. Thomson

B. Kirchoff

C. Ohm

D. M.Planck

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Among the following ions, which are has the highest paramagnetism?

A. $[C r (H_{2} O)_{6}]^{+ 3}$

B. $[F e (H_{2} O)_{6}]^{+ 2}$

C. $[C u (H_{2} O)_{6}]^{+ 2}$

D. $[Z n (H_{2} O)_{6}]^{+ 2}$

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The number of neutrons in the deuterium atom is

A. 16

B. 3

C. 1

D. 0

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Bohr's concept of the orbit in an atom was contradicted by

A. de Broglie relationship

B. Uncertainty principle

C. Planck's hypothesis

D. Hund's rule

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Accepted Answer

D. 20 protons and 20 neutrons

In the nucleus of ${}_{20}C a^{40}$ there are

Correct Answer :

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Argon is isoelectronic with

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Mass of positron is the same to that of

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Charge on fundamental particle neutrino is

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Davisson and Germer gave an experimental evidence for

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If value of h is taken as $10^{- 34} k g m^{2} s e c^{- 1}$ , the de-Broglie wavelength of a particle of mass $10^{- 31}$ having velocity $10^{9} c m s e c^{- 1}$ is

The atomic number of an element having the valence shell electronic configuration $4 s^{2} 4 p^{6}$ is

Cathode rays contain a stream of

Electronic configuration of $C u^{+}$ is

Charge on an electron was shown by

Among the following ions, which are has the highest paramagnetism?

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Bohr's concept of the orbit in an atom was contradicted by

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In the nucleus of C20a40 there are

Correct Answer :

Show all Atomic Structure MCQ

Related Questions

The possible values of l for an s orbital are

Which of the following atoms has a non-spherical outermost orbital.

The number of unpaired electrons in fluorine atoms is/are

Argon is isoelectronic with

The relationship between energy of a radiation and its frequency was given by

The wavelength of an electron

Which of the following weighs the least?

Mass of positron is the same to that of

The maximum number of electrons in a sub-energy level is equal to

Charge on fundamental particle neutrino is

The corect set of quantum numbers for the impaired electron of fluorine atom is

The size of nucleus is

Davisson and Germer gave an experimental evidence for

Isotopes have different

The ion that is isoelectronic with CO is

The velocity of a photon is

Which of the following has the highest mass?

In an atom of hydrogen, which of the following orbitais has the lowest energy for an electron present in it?

The fundamental particle that has least mass is

The exchange of particles considered responsible for keeping the nucleons together are

The atomic structure of an atom of an element is Is 1s2, 2s22p6, 3s23p6. The element is

Which elements is represented by the following electronic configuration?

If value of h is taken as 10-34 kg m2 sec-1, the de-Broglie wavelength of a particle of mass 10-31 having velocity 109cm sec-1 is

The atomic number of an element having the valence shell electronic configuration 4s24p6 is

Cathode rays contain a stream of

Electronic configuration of Cu+ is

Charge on an electron was shown by

Among the following ions, which are has the highest paramagnetism?

The number of neutrons in the deuterium atom is

Bohr's concept of the orbit in an atom was contradicted by

Also checkout

In the nucleus of ${}_{20}C a^{40}$ there are

The atomic structure of an atom of an element is Is $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{6}$ . The element is

If value of h is taken as $10^{- 34} k g m^{2} s e c^{- 1}$ , the de-Broglie wavelength of a particle of mass $10^{- 31}$ having velocity $10^{9} c m s e c^{- 1}$ is

The atomic number of an element having the valence shell electronic configuration $4 s^{2} 4 p^{6}$ is

Electronic configuration of $C u^{+}$ is