Nuclear Chemistry (Test)
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Avg score: 9% • Most missed: “In 325 days, a 30-gram sample of 95Zr decayed until approximately 1 gram of 95Zr…”
Nuclear Chemistry (Test)
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12 Questions

1. True statements regarding the alkali and naturally occurring lanthanide metals include: I. The chemical reactivity of the alkali metals is due to their low first ionization energies. II. Radioactive nuclei can only become more stable by forming compounds. III. The alkali and lanthanide metals increase their chemical stability by forming compounds.
2. The reaction above represents the bombardment of uranium with a neutron. Which of the following nuclides is represented by X?
3. In 325 days, a 30-gram sample of 95Zr decayed until approximately 1 gram of 95Zr remained in the sample. The half-life of 95Zr is closest to:
4. Coulomb’s law states that like charges repel. Which of the following most accurately explains how the protons in the nucleus can form a stable nucleus?
5. The reaction above shows the synthesis of element X. Which of the following nuclides is represented by X?
6. The alpha decay represented above produces 178O and a proton. Which of the following nuclides is represented by X?
7. If 93.75 percent of a sample of pure radioisotope X decays in 24 days, what is the half-life of X?
8. The reaction above represents the bombardment of uranium with a neutron. Which of the following nuclides is represented by X?
9. The alpha decay represented above produces 178O and a proton. Which of the following nuclides is represented by X?
10. Coulomb’s law states that like charges repel. Which of the following most accurately explains how the protons in the nucleus can form a stable nucleus?
11. The average density of an atomic nucleus is on the order of magnitude closest to which of the following? (The density of osmium, Os, the heaviest known element, is 23 g cm−3. The mass of an average Zn nucleus is approximately 1 × 10−22 g and the radius of a nucleus of that mass is approximately 5 × 10−13 cm.)
12. The average density of an atomic nucleus is on the order of magnitude closest to which of the following? (The density of osmium, Os, the heaviest known element, is 23 g cm−3. The mass of an average Zn nucleus is approximately 1 × 10−22 g and the radius of a nucleus of that mass is approximately 5 × 10−13 cm.)

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