Quiz 6.1
Structure and Properties
1. When alpha particles are fired at an atom, what happens?
a) Most pass straight through and a few are strongly deflected
b) All pass straight through
c) All are strongly deflected
d) Most pass straight through and some are absorbed
2. Why was Rutherford’s atomic model of
orbiting electrons classically untenable?
a) Because there is no force to attract the
electrons to the nucleus
b) Because orbiting electrons are accelerating
and will radiate all their energy
c) Because the positive charge is spread
uniformly throughout the atom
d) Because there are no electrons inside atoms
3. What determines the chemistry of an
atomic element?
a) The innermost electrons
b) The size of the nucleus
c) The outermost electrons
d) The charge of the nucleus
4. What is the nature of light emitted by atoms?
a) A mixture of a few specific colors
b) The full rainbow of colors
c) Always green in color
d) Colors that change over time
Quiz 6.2
Quantized Energy
1. The most intense color emitted by
Hydrogen is
a) Red
b) Cyan
c) Blue
d) Violet
2. Electron matter waves inside atoms have
energies that are
a) discrete
b) continuous
c) arbitrary
d) infinite
3. The visible spectral lines of Hydrogen
result when the electron jumps down to
which energy level?
a) n = 4
b) n = 3
c) n = 2
d) n = 1
4. The ultimate stability of atoms is
explained by the idea that
a) The nucleus repels electrons
b) The electrons continually change direction
c) Only certain colors are emitted by atoms
d) There is a standing wave of lowest frequency
Quiz 6.3
The Nucleus
1. How many neutrons are in 235
92𝑈 ?
a) 235
b) 92
c) 143
d) 146
2. Which of the following elements has the most stable nucleus?
a) Helium
b) Lithium
c) Nickel
d) Uranium
1. Which of the following does not proceed by quantum tunneling?
a) Alpha decay
b) Fission
c) Fusion
d) Diffraction
2. Which of the following is not a technology derived from nuclear physics?
a) Food sterilization
b) Smoke detectors
c) Barcode scanners
d) Gamma cameras
Quiz 6.4
Condensed Matter
1. The Pauli Exclusion Principle implies
a) No two fermions may be in the same place
b) No two bosons may be in the same place
c) Electrons are excluded from atoms
d) Light amplification by stimulated emission
of radiation
2. A semiconductor allows electricity to
flow
a) Sometimes
b) Never
c) Always
d) On Friday mornings only
3. Which of the following is not required for
LASER operation?
a) Quantum Tunneling
b) Population inversion
c) Stimulated Emission
d) Chain Reaction
4. The uncertainty principle prevents
reaching zero Kelvin because
a) There is uncertainty in the temperature
b) It would require an infinite amount of energy
c) At rest, position is completely unknown
d) Absolute Zero is a classical concept