Unit Test — Unit test Answers
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Which statement is part of Bohr's atomic model?
A
Electrons absorb or emit light when they change energy levels.B
Electrons with the highest energy are found with orbits of the smallest radius.C
Electrons exist as waves and clouds of probability with specific orbits and shapes.D
Electrons orbit the nucleus in narrow ellipses, like how the planets orbit the Sun.22
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Wilam made a chart to summarize the results of experiments with the photoelectric effect.
A
The first result should state that frequencies of light that were lower than the frequency threshold of the metal could not eject electrons.B
The second result should state that as soon as light struck the metal, protons were ejected.C
The second result should state that just before light struck the metal, electrons were ejected.D
The third result should state that the kinetic energy of the ejected electrons depends only on the frequency of the photons.23
What conditions are required for nuclear fusion?
A
high temperature and low pressureB
high temperature and high pressureC
low temperature and high pressureD
low temperature and low pressure24
Which is the best predictor of the radioactive nature of an isotope?
A
the proton-to-electron ratioB
the neutron-to-proton ratioC
the neutron-to-electron ratioD
the electron-to-proton ratio25
Which therapeutic application involves the placement of a pellet of radioactive material near a tumor?
A
radionuclide therapyB
external beam radiation therapyC
acoustic targeted drug deliveryD
brachytherapyDid you find these answers helpful?
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