Which of the following sets of quantum numbers represent an impossible arrangement - 

       n   l    m     s

(1)  3   2   -2   (+)1/2

(2)  4   0   0    (-)1/2

(3)  3   2   -3   (+)1/2

(4)  5   3   0   (-)1/2

Concept Questions :-

Quantum Numbers
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How many unpaired electrons are present in Ni2+ cation (atomic number = 28)

(1) 0

(2) 2

(3) 4

(4) 6

Concept Questions :-

AUFBAU Principle
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Correct set of four quantum numbers for the outermost electron of rubidium (Z=37) is:

(1) 5, 0, 0, 1/2

(2) 5, 1, 0, 1/2

(3) 5, 1, 1, 1/2

(4) 6, 0, 0, 1/2

Concept Questions :-

Quantum Numbers
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Number of unparired electrons in 1S2 2S2 2P3 is -

1. 2

2. 0

3. 3

4. 1

Concept Questions :-

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The quantum numbers of four electrons are given below.

                                  n            l           m          s 

(1) Electron 1             3            0             0           -1/2

(2) Electron 2             4            0             0           1/2

(3) Electron 3            3             2             0           1/2

(4) Electron 4            3             1             0           -1/2

The correct order of decreasing energy of these electrons is - 

(1) Electron 3 > Electron 1 > Electron 4> Electron 2

(2) Electron 4> Electron 2 > Electron 3 > Electron 1

(3) Electron 3 > Electron 2 > Electron 4 > Electron 1

(4) Electron 2 > Electron 4 > Electron 3 > Electron 1

Concept Questions :-

Quantum Numbers
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Which type of radiation is not emitted by the electronic structure of atoms:

(1) Ultraviolet light

(2) X-rays

(3) Visible light

(4) y-rays

Concept Questions :-

EMT Radiation
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Of the following transitions in hydrogen atom, the one which gives an absorption line of lowest frequency is

1. n=1 to n=2

2. n=3 to n=8

3. n=2 to n=1

4. n=8 to n=3

Concept Questions :-

Hydrogen Spectra
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If uncertainty in the position of an electron is zero the uncertainty in its momentum will be

(1) < h/4π

(2) > h/4π

(3) zero

(4) infinite

Concept Questions :-

Heisenberg Uncertainity Principle
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The maximum number of atomic orbitals associated with a principal quantum number 5 is

(1) 9

(2) 12

(3) 16

(4) 25

Concept Questions :-

Quantum Numbers
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The de Broglie wavelength of electron of He+ ion is 3.329Å. If the photon emitted upon de-excitation of this He+ ion is made to hit H atom in its ground state so as to liberate electron from it, what will be the de Broglie's wavelength of photoelectron ?

(1) 0.1518 Å

(2) 6.1518 Å

(3) 2.3518 Å

(4) 4.1218 Å

Concept Questions :-

de Broglie Equation
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