Which state of triply ionised Beryllium Be+++ has the same orbital radius as that of the ground state of hydrogen

(1) n = 4                 

(2) n = 3

(3) n = 2                 

(4) n = 1

Subtopic:  Bohr's Model of Atom |
 66%
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The ratio of areas within the electron orbits for the first excited state to the ground state for hydrogen atom is

1. 16 : 1             

2. 18 : 1

3. 4 : 1               

4. 2 : 1

Subtopic:  Bohr's Model of Atom |
 64%
From NCERT
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Taking Rydberg’s constant RH=1.097×107 m first and second wavelength of Balmer series in hydrogen spectrum is

(1) 2000 Å, 3000 Å                 

(2) 1575 Å, 2960 Å

(3) 6529 Å, 4280 Å                 

(4) 6552 Å, 4863 Å

Subtopic:  Spectral Series |
 61%
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The kinetic energy of electron in the first Bohr orbit of the hydrogen atom is 

(1) – 6.5 eV               

(2) – 27.2 eV

(3) 13.6 eV               

(4) – 13.6 eV

Subtopic:  Bohr's Model of Atom |
 74%
From NCERT
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In Bohr’s model of hydrogen atom, which of the following pairs of quantities are quantized 

(1) Energy and linear momentum

(2) Linear and angular momentum

(3) Energy and angular momentum

(4) None of the above

Subtopic:  Bohr's Model of Atom |
 79%
From NCERT
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The energy of the highest energy photon of Balmer series of hydrogen spectrum is close to
(1) 13.6 eV             

(2) 3.4 eV

(3) 1.5 eV               

(4) 0.85 eV

Subtopic:  Spectral Series |
 76%
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Which one of the relation is correct between time period and number of orbits while an electron is revolving in a orbit

(1) n2             

(2) 1n2

(3) n3             

(4) 1n

Subtopic:  Bohr's Model of Atom |
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An electron changes its position from orbit n = 4 to the orbit n = 2 of an atom. The wavelength of the emitted radiation’s is (R = Rydberg’s constant)

(1) 16R             

(2) 163R

(3) 165R             

(4) 167R

Subtopic:  Bohr's Model of Atom |
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If the energy of a hydrogen atom in nth orbit is En, then energy in the nth orbit of a singly ionized helium atom will be 

(1) 4En             

(2) En/4

(3) 2En             

(4) En/2

Subtopic:  Bohr's Model of Atom |
 78%
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The ground state energy of hydrogen atom is – 13.6 eV. What is the potential energy of the electron in this state

1. 0 eV                       

2. – 27.2 eV

3. 1 eV                       

4. 2 eV

Subtopic:  Bohr's Model of Atom |
 84%
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