The spectral lines of atomic spectra are A) images of the slit ...

[EY67]

The spectral lines of atomic spectra are
 
  A) images of the slit in a spectroscope.
  B) orderly, and even predictable.
  C) as an identity of atoms as fingerprints are of people.
  D) all of the above
  E) none of the above

Question 2

When an electron de-excites from the third quantum level to the second, and then to the ground state, two photons are emitted.
 
  The sum of the emitted frequencies equals the frequency of the single photon that would be emitted if de-excitation were from the third to
  A) the second level.
  B) the ground state.
  C) any other level.
  D) none of the above

[ally]

Answer to Question 1

Answer: D

Answer to Question 2

Answer: B

[EY67]

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[Viet Thy]

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