Chemistry Manual 2012-2013 - Edison State College

Blake Schmidt - Unit 11 Page 59
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U11 EP1 Unit 11: Example Problems 1
Electromagnetic Spectrum
Because excited hydrogen atoms always produce the same line-emission spectrum, scientists
concluded that hydrogen
a. had no electrons. c. released photons of only certain energies.
b. did not release photons. d. could only exist in the ground state.
When the pink-colored light of glowing hydrogen gas passes through a prism, it is possible to
see
a. all the colors of the rainbow. c. four lines of different colors.
b. only lavender-colored lines. d. black light.
The product of the frequency and the wavelength of a wave equals the
a. number of waves passing a point in a second.
b. speed of the wave.
c. distance between wave crests.
d. time for one full wave to pass.
Visible light, X rays, infrared radiation, and radio waves all have the same
a. energy. c. speed.
b. wavelength. d. frequency.
For electromagnetic radiation, c (the speed of light) equals
a. frequency minus wavelength. c. frequency divided by wavelength.
b. frequency plus wavelength. d. frequency times wavelength.
If electromagnetic radiation A has a lower frequency than electromagnetic radiation B, then
compared to B, the wavelength of A is
a. longer. c. equal.
b. shorter. d. exactly half the length of B's wavelength.
According to Bohr, electrons cannot reside at ____ in the figure below.
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A line spectrum is produced when an electron moves from one energy level
a. to a higher energy level. c. into the nucleus.
b. to a lower energy level. d. to another position in the same sublevel.
The Bohr model of the atom was an attempt to explain hydrogen's
a. density. c. mass.
b. flammability. d. line-emission spectrum.
If electrons in an atom have the lowest possible energies, the atom is in the
a. ground state. c. excited state.
b. inert state. d. radiation-emitting state.
The distance between two successive peaks on adjacent waves is its
a. frequency. c. quantum number.
b. wavelength. d. velocity.
The wave model of light does not explain
a. the frequency of light. c. interference.
b. the continuous spectrum. d. the photoelectric effect.
The energy of a photon is related to its
a. mass. c. frequency.
b. speed. d. size.