Atoms and Nuclei (NEET Physics): Questions 11  15 of 67
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Question number: 11
» Atoms and Nuclei » Hydrogen Spectrum
Question
Consider a hydrogen like atom whose energy in n ^{th} excited state is given by when this excited atom makes a transition from excited state to ground state, most energetic photons have energy E _{max} = 52.224 eV and least energetic photons have energy E _{min} =1224 eV. The atomic number of atom is,
Choices
Choice (4)  Response  

a.  5  
b.  2  
c.  4  
d.  None of the above 
Question number: 12
» Atoms and Nuclei » Bohr Model
Question
If m is mass of electron, v its velocity, r the radius of stationary circular orbit around a nucleus with charge Ze, then from Bohr’s first postulate, the kinetic energy of the electron in C. G. S system is equal to.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 13
» Atoms and Nuclei » Hydrogen Spectrum
Question
The energy of electron in the n ^{th} orbit of hydrogen atom is expressed as wavelength of Lyman series will be
Choices
Choice (4)  Response  

a.  910 Å, 1213 Å  
b.  1315 Å , 1530 Å  
c.  5463 Å, 7858 Å  
d.  None of the above 
Question number: 14
» Atoms and Nuclei » Hydrogen Spectrum
Question
In the following atoms and molecule for the transition from n = 2 to n = 1, the spectral line of minimum wavelength will be produced by,
Choices
Choice (4)  Response  

a.  Diionized lithium  
b.  Hydrogen atom  
c.  Uniionized helium  
d.  Deuterium atom 
Question number: 15
» Atoms and Nuclei » Energy Levels
Question
Energy levels A, B, C of a certain atom corresponding to increasing values of energy E _{A } < E _{B} < E _{C}. If λ _{1, } λ _{2}, λ _{3} are the wavelengths of radiations corresponding to the transitions C to B, B to A and C to A respectively, which of the following statements is correct?
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
