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What is the correct answer?

4

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

A.

nlm
210

B.

nlm
211

C.

nlm
311

D.

nlm
300

Correct Answer :

B.

nlm
211


Related Questions

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4

The number of neutrons present in K1939 are

A. 28

B. 39

C. 20

D. 19

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4

In Lyman series an electron jumps from higher energy level to

A. K energy level

B. M energy level

C. N energy level

D. L energy level

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4

Mass of positron is the same to that of

A. proton

B. meson

C. electron

D. neutron

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4

In the nucleus of C20a40 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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4

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

A. 35

B. 26

C. 23

D. 34

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4

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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4

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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4

The number of neutrons in the deuterium atom is

A. 16

B. 3

C. 1

D. 0

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4

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

A.

nlm
210

B.

nlm
211

C.

nlm
311

D.

nlm
300

What is the correct answer?

4

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

A. Cl-35

B. S-32

C. N-18

D. O-16

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4

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

A. γ- rays

B. cathode rays

C. continuous spectra

D. absorption spectra

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4

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

A. 0.01 m

B. 2 nm

C. 0.1 nm

D. 15Å

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4

In the case of atomic spectrum of hydrogen which series of lines lie in the visible region?

A. Balmer

B. Paschen 

C. Pfund

D. None of these

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4

Which elements is represented by the following electronic configuration?

A. Nitrogen

B. Oxygen

C. Fluorine

D. Neon

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4

Isotones have same

A. mass number

B. nuclear mass

C. no. of neutrons

D. no. of electrons

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4

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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4

Which of the following has the highest mass?

A. Neutron

B. Alpha particle

C. Electron

D. Deuterium

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4

Frequency of the wave having wave number 20000 cm-1 is

A. 6×1012 sec-1

B. 6×1014 sec-1

C. 3×1014MHz

D. 4×106Hz

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4

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

A. 4(2l+1)

B. 2(2l+1)

C. 2n2

D. n3

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4

The orbitals with maximum number of possible orientation is:

A. s

B. d

C. f

D. p

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4

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

A. 11.6 × 10-5m

B. 11.6 × 10-9m-1

C. 14.6 × 10-5m

D. 1.46 × 10-9m

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4

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

A. [Cr(H2O)6]+3

B. [Fe(H2O)6]+2

C. [Cu(H2O)6]+2

D. [Zn(H2O)6]+2

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4

β rays are a stream of

A. He

B. electrons

C. positron

D. neutrons

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4

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

A. Hund's rules

B. Flemming rule

C. Pauli's exclusion principle

D. Bohr theory

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4

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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4

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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4

Wave number is defined as

A. 3λ

B. λ2nπ

C. h2π

D. 1λ

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4

Charge on an electron was shown by

A. J. J. Thomson

B. Kirchoff

C. Ohm

D. M.Planck

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4

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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4

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

A. n2

B. 2l+1

C. 4(2l+3)

D. 2n3