Practice Quiz Chapter 24If you miss more than three, you should study more befor taking the on-line quiz.You may retake this test as many times as you like.
Detection of radiation by a Geiger-Müller counter depends on
the emission of a photon from an excited atom.
the ability of an ionized gas to carry an electrical current.
the emission of a photon of light by the radioactive particle.
the ability of a photomultiplier tube to amplify the electrical signal from a phosphor.
the detection of the sound made by decay particles.
A bottle of vintage red wine has lost its label. The concentration of tritium in the wine is 0.34 times that found in freshly bottled wines. If the half-life of tritium is 12.3 years, estimate the time elapsed since the wine was bottled.
What is the mechanism by which control rods slow down the fission rate in a nuclear reactor?
The radiochemist, Will I. Glow, studied thorium-232 and found that 2.82 × 10-7 moles emitted 8.42 × 106 α particles in one year. What is the decay constant for thorium-232?
3.35 × 10-14 yr-1
4.96 × 10-11 yr-1
1.40 × 1010 yr-1
2.99 × 1013 yr-1
none of the above
Identify the missing species in the following nuclear transmutation.
The s-process involves a slow succession of neutron absorption and beta decay processes during the normal life of a star.
The radioisotope will decay through
α decay.
β decay.
positron decay.
electron capture.
γ decay.
The masses of a potassium-40 atom, a proton and a neutron are 39.963999 amu, 1.007825 amu and 1.008665 amu, respectively. Calculate to four significant figures a. the mass defect in amu and b. the energy released in MeV/nucleon, in the formation of from the appropriate number of protons and neutrons.
When an electron and its anti-particle, a positron, collide, they annihilate each other. Calculate the energy released in this process, in J. (The positron mass is the same as the electron mass, namely 9.11 × 10-31 kg.)
Radioactive decay follows zero-order kinetics.
Which of the following isotopes is most likely to be unstable?
Write a complete, balanced equation to represent the formation of manganese-55 by the beta decay of another nuclide.
In the equation above, what particle or type of radiation needs to be included on the right hand side in order to balance it?
alpha
beta
gamma
positron
proton
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