Module 2: Chapter 8 Quiz
Protons and neutrons have about the same mass.
True
Photons of which of the following colors of light possess the greatest amount of energy?
blue
Rutherford concluded from his calculations that the volume of an atom
is mostly empty space.
Neutral atoms of a given element all have the same
number of protons. atomic number. number of electrons.
1. According to the cartoon video on physics, if light always behaved as particles, what would be seen if it were sent through 2 slits?
2 lines
Heisenberg's uncertainty principle says that you cannot know the momentum or the position of an electron exactly.
False
The atomic number of an element is the total number of protons and neutrons in the nucleus.
False
What is unique about noble gases that causes it to be very chemically stable?
They have completely filled their outer orbital with electrons
what do astronomers use spectral lines for?
To determine the composition of stars
An electron moves from one orbital to another only when it absorbs or emits energy.
True
Millikan found that all of the oil droplets in his apparatus carried a charge that was an integer multiple of one particular value.
True
Protons are so much more massive than electrons that you can neglect the mass of electrons when determining the mass of an atom.
True
According to the video on spectral lines, what do astronomers use spectral lines for?
considers the electron as a wave.
The quantum mechanical model of the atom differs from the Bohr model in that it
considers the electron as a wave.
The energy of a photon of light emitted by an electron equals the
difference in energy between two levels.
The atomic number of an element is the number of
protons.
Isotopes of an element are atoms that have
the same number of protons, but a different number of neutrons.
1. Niels Bohr's model of the hydrogen atom
was controversial because it contradicted accepted principles of physics. held that electrons existed in allowed orbits and nowhere else. accounted for the observed spectrum in hydrogen.
According to the video on spectral lines, the velocity of the light source reveals itself in tiny shifts in the _______ of the spectral lines.
wavelength
