The number of unpaired electrons in the ground state of chromium is

Question

The number of unpaired electrons in the ground state of chromium is

A. 1

B. 6

C. 7

D. 2

Correct Answer :

B. 6

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The orbitals with maximum number of possible orientation is:

A. s

B. d

C. f

D. p

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

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The number of unpaired electrons in a chromic ion $C r^{+ 3}$ (atomic number 24) is

A. 6

B. 4

C. 3

D. 1

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Isotopes have different

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

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When the electron is excited from K level to M level we get

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The angular momentum of the moving electron is equal to

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Davisson and Germer gave an experimental evidence for

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Isotones have same

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Which of the following has the highest mass?

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Which elements is represented by the following electronic configuration?

B. Oxygen

D. Neon

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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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For a given energy level the number of orbitals is equal to

A. $n^{2}$

B. $2 l + 1$

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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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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 wavelength of an electron

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The number of neutrons present in ${}_{19}^{39}K$ are

A. 28

B. 39

C. 20

D. 19

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The wavelength of an electron moving with a velocity $5 \times 10^{5} m s e c^{- 1} i s (h = 6.63 \times 10^{- 34} k g m^{2} s e c^{- 1})$

Discuss this answer

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

A. Planck

D. Joule

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Mass of positron is the same to that of

A. proton

B. meson

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

A. meson

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

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The number of unpaired electrons in the ground state of chromium is

A. 1

B. 6

C. 7

D. 2

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The fundamental particle that has least mass is

A. meson

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

C. $2 n^{2}$

D. $n^{3}$

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The size of nucleus is

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No two electrons in an atom can have the same values of all four quantum numbers according to

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The number of neutrons in the deuterium atom is

A. 16

B. 3

C. 1

D. 0

Discuss this answer

The ion that is isoelectronic with CO is

A. $C N^{-}$

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Answer 1

A.

[A r] 3 d^{9}

Answer 2

B.

[A r] 3 d^{10}

Answer 3

C.

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

Answer 4

D.

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

Answer 5

A. arrangement of electrons

Answer 6

B. no. of P and e'

Answer 7

C. no. of neutrons

Answer 8

D. no. of electrons

Answer 9

A. 40 protons and 20 electrons

Answer 10

B. 20 protons and 40 electrons

Answer 11

C. 20 protons and 40 neutrons

Answer 12

D. 20 protons and 20 neutrons

Answer 13

A.

γ

- rays

Answer 14

B. cathode rays

Answer 15

C. continuous spectra

Answer 16

D. absorption spectra

Answer 17

A.

\sqrt{n h}

Answer 18

B.

\frac{h^{2}}{2 π}

Answer 19

C.

\frac{n h}{π}

Answer 20

D.

\frac{n h}{2 π}

Answer 21

A. wave nature of electron

Answer 22

B. particle nature of electron

Answer 23

C. particle nature of light

Answer 24

D. wave nature of light

Answer 25

A. mass number

Answer 26

B. nuclear mass

Answer 27

C. no. of neutrons

Answer 28

D. no. of electrons

Answer 29

A. Neutron

Answer 30

B. Alpha particle

Answer 31

C. Electron

Answer 32

D. Deuterium

Answer 33

A. Nitrogen

Answer 34

C. Fluorine

Answer 35

C.

4 (2 l + 3)

Answer 36

D.

\sqrt{2 n^{3}}

Answer 37

A. is equal to that of light

Answer 38

B. remains constant with velocity

Answer 39

C. decreases with an increasing velocity

Answer 40

D. increases with an decreasing velocity

Answer 41

A.

11.6 \times 10^{- 5} m

Answer 42

B.

11.6 \times 10^{- 9} m^{- 1}

Answer 43

C.

14.6 \times 10^{- 5} m

Answer 44

D.

1.46 \times 10^{- 9} m

Answer 45

B. Rutherford

Answer 46

C. Einstein

Answer 47

C. electron

Answer 48

D. neutron

Answer 49

B. electron

Answer 50

C. positron

Answer 51

D. neutron

Answer 52

A. de Broglie relationship

Answer 53

B. Uncertainty principle

Answer 54

C. Planck's hypothesis

Answer 55

D. Hund's rule

Answer 56

B. alpha-particle

Answer 57

C. electron

Answer 58

D. neutron

Answer 59

A.

4 (2 l + 1)

Answer 60

B.

2 (2 l + 1)

Answer 61

A.

10^{- 12} m

Answer 62

B.

10^{- 8} m

Answer 63

C.

10^{- 15} m

Answer 64

D.

10^{- 10} m

Answer 65

A. Hund's rules

Answer 66

B. Flemming rule

Answer 67

C. Pauli's exclusion principle

Answer 68

D. Bohr theory

Answer 69

B.

{O_{2}}^{+}

Answer 70

C.

{O_{2}}^{-}

Answer 71

D.

{N_{2}}^{+}

The number of unpaired electrons in the ground state of chromium is

Correct Answer :

Show all Atomic Structure MCQ

Related Questions

The orbitals with maximum number of possible orientation is:

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

The number of unpaired electrons in a chromic ion $C r^{+ 3}$ (atomic number 24) is

Isotopes have different

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

When the electron is excited from K level to M level we get

The angular momentum of the moving electron is equal to

Davisson and Germer gave an experimental evidence for

Isotones have same

Which of the following has the highest mass?

Which elements is represented by the following electronic configuration?

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

For a given energy level the number of orbitals is equal to

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

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 wavelength of an electron

The number of neutrons present in ${}_{19}^{39}K$ are

The wavelength of an electron moving with a velocity $5 \times 10^{5} m s e c^{- 1} i s (h = 6.63 \times 10^{- 34} k g m^{2} s e c^{- 1})$

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

Mass of positron is the same to that of

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

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

The number of unpaired electrons in the ground state of chromium is

The fundamental particle that has least mass is

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

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

The size of nucleus is

No two electrons in an atom can have the same values of all four quantum numbers according to

The number of neutrons in the deuterium atom is

The ion that is isoelectronic with CO is

Also checkout

The number of unpaired electrons in the ground state of chromium is

Correct Answer :

Show all Atomic Structure MCQ

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The orbitals with maximum number of possible orientation is:

Electronic configuration of Cu+ is

The number of unpaired electrons in a chromic ion Cr+3 (atomic number 24) is

Isotopes have different

In the nucleus of C20a40 there are

When the electron is excited from K level to M level we get

The angular momentum of the moving electron is equal to

Davisson and Germer gave an experimental evidence for

Isotones have same

Which of the following has the highest mass?

Which elements is represented by the following electronic configuration?

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

For a given energy level the number of orbitals is equal to

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

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 wavelength of an electron

The number of neutrons present in K1939 are

The wavelength of an electron moving with a velocity 5×105m sec-1 is (h=6.63 ×10-34 kg m2 sec-1)

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

Mass of positron is the same to that of

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

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

The number of unpaired electrons in the ground state of chromium is

The fundamental particle that has least mass is

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

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

The size of nucleus is

No two electrons in an atom can have the same values of all four quantum numbers according to

The number of neutrons in the deuterium atom is

The ion that is isoelectronic with CO is

Also checkout

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

The number of unpaired electrons in a chromic ion $C r^{+ 3}$ (atomic number 24) is

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

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 number of neutrons present in ${}_{19}^{39}K$ are

The wavelength of an electron moving with a velocity $5 \times 10^{5} m s e c^{- 1} i s (h = 6.63 \times 10^{- 34} k g m^{2} s e c^{- 1})$

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