The ratio of longest wavelengths corresponding to Lyman and Balmer series in hydrogen spectrum is

(1)5/27

(2)3/23

(3)7/29

(4)9/31

Subtopic:  Spectral Series |
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NEET - 2013
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Out of the following which one is not a possible energy for a photon to be emitted by hydrogen atom according to Bohr's atomic model?

(1)1.9eV                                         

(2)11.1eV

(3)13.6eV                                       

(4)0.65eV

Subtopic:  Bohr's Model of Atom |
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From NCERT
NEET - 2011
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The electron in the hydrogen atom jumps from excited state n=3 to its ground state n=1 and the photons thus emitted irradiate a photosensitive material. If the work function of the material is 5.1 eV, the stopping potential is estimated to be (the energy of the electron in the nth state En=-13.6n2eV)

1. 5.1 V                                               2. 12.1 V

3. 17.2 V                                              4. 7 V

Subtopic:  Bohr's Model of Atom |
 63%
From NCERT
NEET - 2010
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The ionization energy of the electron in the hydrogen atom in its ground state is 13.6 eV. The atoms are excited to higher energy levels to emit radiations of 6 wavelengths. Maximum wavelength of emitted radiation corresponds to the transition between

(a) n=3 to n=2 states

(b) n=3 to n=1 states

(c) n=2 to n=1 states

(d) n=4 to n=3 states

Subtopic:  Spectral Series |
 61%
From NCERT
NEET - 2009
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The ratio of specific charge of an α-particle to that of a proton is 
(1) 2 : 1                     

(2) 1 : 1
(3) 1 : 2                     

(4) 1 : 3

Subtopic:  Various Atomic Models |
 60%
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The Rutherford α-particle experiment shows that most of the α-particles pass through almost unscattered while some are scattered through large angles. What information does it give about the structure of the atom?

1. Atom is hollow.
2. The whole mass of the atom is concentrated in a small center called the nucleus.
3. Nucleus is positively charged.
4. All of the above
Subtopic:  Various Atomic Models |
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An electron has a mass of 9.1×10-31 kg. It revolves round the nucleus in a circular orbit of radius 0.529×10-10 metre at a speed of 2.2×106 m/s. The magnitude of its linear momentum in this motion is

(a) 1.1×10-34 kg-m/s             (b) 2.0×10-24 kg-m/s 
(c) 4.0×10-24 kg-m/s           (d) 4.0×10-31 kg-m/s

Subtopic:  Various Atomic Models |
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An electron jumps from the 4th orbit to the 2nd orbit of hydrogen atom. Given the Rydberg's constant R = 105 cm-1. The frequency in Hz of the emitted radiation will be 
(a) 316×105           (b) 316×1015
(c) 916×1015          (d) 34×1015

Subtopic:  Bohr's Model of Atom |
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An electron in the n = 1 orbit of hydrogen atom is bound by 13.6 eV. If a hydrogen atom is in the n = 3 state, how much energy is required to ionize it 
(1) 13.6 eV                     

(2) 4.53 eV
(3) 3.4 eV                       

(4) 1.51 eV

Subtopic:  Bohr's Model of Atom |
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Which of the following statements about the Bohr model of the hydrogen atom is false 

(1) Acceleration of electron in n = 2 orbit is less than that in n = 1 orbit

(2) Angular momentum of electron in n = 2 orbit is more than that in n = 1 orbit

(3) Kinetic energy of electron in n = 2 orbit is less than that in n = 1 orbit

(4) Potential energy of electron in n = 2 orbit is less than that in n = 1 orbit

Subtopic:  Bohr's Model of Atom |
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