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Bohr's Model And Limitations
Test Description: Review of Bohr's model and its limitations
Instructions: Answer all questions to get your test result.
1) For an electron in an atom to change from the ground state to an excited state,
A
radiation must be emitted.
B
energy must be absorbed.
C
energy must be released.
D
the electron must make a transition from a higher to a lower energy level.
2) 14. If electrons in an atom have the lowest possible energies, the atom is in the
A
excited state.
B
inert state.
C
ground state.
D
radiation-emitting state.
3) The change of an atom from an excited state to the ground state always requires
A
release of visible light.
B
an increase in electron energy.
C
absorption of energy.
D
emission of electromagnetic radiation.
4) The French scientist Louis de Broglie theorized that
A
electrons could have a dual wave-particle nature.
B
Bohr's model of the hydrogen atom was completely correct.
C
light waves did not have a dual wave-particle nature.
D
the natures of light and quantized electron orbits were not similar.
5) Which model of the atom explains the orbitals of electrons as waves?
A
the Bohr model
B
Rutherford's model
C
the quantum model
D
Planck's theory
6) All of the following describe the Schrödinger wave equation except
A
it is an equation that treats electrons in atoms as waves.
B
only waves of specific energies and frequencies provide solutions to the equation.
C
it is similar to Bohr's theory.
D
it helped lay the foundation for the modern quantum theory.
7) A three-dimensional region around a nucleus where an electron may be found is called a(n)
A
orbit.
B
spectral line.
C
electron path.
D
orbital.
8) According to the quantum theory of an atom, in an orbital
A
electrons cannot be found.
B
electrons travel around the nucleus on paths of specific radii.
C
an electron's position cannot be known precisely but can be predicted.
D
an electron has no energy.
9) The velocity nor the position of an electron cannot be known at the same time according to
A
Heisenberg uncertainty principle
B
the butterfly effect
C
the photo electric effect
D
the dual nature of the electron
10) If the intensity of a photon is increased, but the photon has a lower energy than the electron to be ejected from a metal then
A
the photon will be absorbed the metal
B
the electron will be ejected
C
the electron will not be ejected
D
the photon will be absorbed by the electron
*select an answer for all questions
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