Physics Principles and Problems 2009

Section 28.1 : The Bohr Model of the Atom

Self-Check Quizzes

1
Why is Rutherford's atomic model called the nuclear model?
A)because it predicted a dense central core or nucleus
B)because it determined the mass of a nucleus
C)because it predicted a massive positively-charged nucleus with electrons distributed within it
D)because the alpha particles passed through the gold foil without being deflected
2
What can emission spectra be used to analyze?
A)the wavelengths of a gas
B)the number of electrons in the atom of a particular element
C)the structure of an atom
D)the composition of a mixture of elements
3
What did Bohr theorize about the energy levels of atoms?
A)that they cannot be measured
B)that they cause electrons to spiral into the nucleus
C)that they cause the atom to radiate light
D)that they are quantized
4
The change in energy of an atom equals the energy of the _____.
A)emitted photon
B)nucleus
C)electromagnetic spectrum
D)ground state
5
Why does the energy of an atom have a negative value?
A)because an atom is normally in its ground state
B)due to the effects of electromagnetic radiation
C)because work has to be done to remove an electron from an atom
D)because energy is constantly emitted
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