Chemistry Multiple Choice

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Need help with Chemistry homework. Mostly all of them are multiple choice. Please find all the questions in the attachment.

Nuclear chemistry involves changes in the _____. nucleus valence electrons bond number inner electrons photons Radioactivity results from the decay of unstable _____. electrons light nuclei heavy nuclei photons bonds Identify the radioactive emission with the highest penetrating power. Electrons Beta particles Alpha particles Gamma rays Neutrons Which of these is the correct representation of an alpha particle? Which of these is the correct representation of a beta particle? Which of the following occurs during beta emission? The mass number increases. The mass number decreases. The atomic number increases. The atomic number decreases. None of the above Which of the following occurs during gamma emission? The mass number increases. The mass number decreases. The atomic number increases. The atomic number decreases. The mass number and the atomic number remain the same. Which particle completes this equation? → _____ + An alpha particle A beta particle A gamma particle A positron A proton Uranium-238 decays via alpha emission to produce _____. Which of the following radioactive decays does not produce an atom of a different element? Alpha Beta Gamma Electron capture Positron Which of the following isotopes is naturally radioactive? Nitrogen-13 has a half-life of 10 minutes. What amount of a 16 mg sample would remain after 30 minutes? 0.5 mg 1 mg 2 mg 4 mg 8 mg What percentage of a radioactive sample will remain after one half-life? 100% 75% 50% 25% 0% Which of these statements about fission reactions is incorrect? Fission reactions release a large amount of energy. Two lighter nuclei combine to form a heavier nucleus. The fission of uranium-235 is initiated by the absorption of a neutron. The first atomic bomb involved the fission of uranium-235 nuclei. Fermi mistakenly discovered a fission reaction while synthesizing a new element. The term used to describe the melting of an overheated nuclear reactor core is known as the _____. Manhattan Project chain reaction China Syndrome critical mass nuclear binding energy Which of these statements about fusion is correct? Two lighter nuclei combine to form a heavier nucleus. The fusion of uranium-238 nuclei was at the heart of the first atomic bomb. Fusion waste products are typically more hazardous than fission materials. Fusion reactions release a huge amount of energy but less than that of fission reactions. All of these statements are correct. Which among the following is the most significant problem in producing energy from fusion reactions? Limited resources Air pollution Low-energy yield Excessive radioactivity Requirement of high temperature for fusion reactions Which among the following radioactive exposures would be the most damaging if it occurs inside a human body? Gamma radiation Alpha emission Beta emission Positron emission Electron emission Which of these is the correct unit for measuring human radioactive exposure? Hint: there are two correct answers. Roentgen Curie Rem Sievert Becquerel Which among the following elements is the largest naturally occurring source of radiation? Xenon Argon Neon Radon Krypton Which among the following is not an application of nuclear chemistry? Medicine Energy Radioactive dating Warfare All of these are applications of nuclear chemistry. Which of these medical applications of nuclear chemistry is/are used in the treatment of cancerous tumors? Tracers Fission Chemotherapy Radiation therapy Mass defect Which of these is/are a common source of radiation exposure for humans? X-rays Cancer treatment Radon gas X-rays and cancer treatment X-rays, cancer treatment, and radon gas Which of these health concerns is/are most common for higher radon exposure? Thyroid cancer Breast cancer Lung cancer Birth defects Leukemia Which particle completes this equation? → ____ + An alpha particle A beta particle A gamma particle A positron A proton OWl 1.The nuclear symbol for a beta particle is The name for the greek letter γ is Of the radiations alpha, beta and gamma, the most penetrating. . is the least penetrating and 2.Which of the following characterizes an alpha ray? Choose all that apply. is a product of natural radioactive decay is composed of helium nuclei is more penetrating than a beta ray carries a negative charge is is attracted to the negatively charged plate in an electric field 3.Which of the following characterizes a beta ray? Choose all that apply. is composed of electrons is composed of protons is electromagnetic radiation is a product of natural radioactive decay carries a negative charge 4.Which of the following characterizes a gamma ray? Choose all that apply. is more penetrating than an alpha ray is very-high-energy similar to X-rays is composed of particles carries a positive charge is a product of natural radioactive decay 5. 6.Write a balanced nuclear equation for the following: The nuclide thorium-230 undergoes alpha emission. 7. Fill in the nuclide symbol for the missing particle in the following nuclear equation. 8. Write a balanced nuclear equation for the following: The nuclide phosphorus-32 undergoes beta emission. 9. Complete the following nuclear bombardment equation by filling in the nuclear symbol for the missing species. 10. Which of the following describe(s) the following reaction? Choose all that apply. bombardment reaction alpha decay reaction fission reaction beta decay reaction potential chain reaction

Tutor Answer

Missmourine
School: New York University

Attached.

1
RADIOACTIVITY

Radioactivity
Student’s Name
Institutional Affiliation

Nuclear chemistry involves changes in the _____.
nucleus
valence electrons
bond number
inner electrons
photons
Radioactivity results from the decay of unstable _____.
electrons
light nuclei
heavy nuclei
photons
bonds
Identify the radioactive emission with the highest penetrating power.
Electrons
Beta particles
Alpha particles
Gamma rays
Neutrons

2
RADIOACTIVITY
Which of these is the correct representation of an alpha particle?

ANSWER A
Which of these is the correct representation of a beta particle?

ANSWER B
Which of the following occurs during beta emission?
The mass number increases.
The mass number decreases.
The atomic number increases.
The atomic number decreases.
None of the above
Which of the following occurs during gamma emission?
The mass number increases.
The mass number decreases.
The atomic number increases.
The atomic number decreases.
The mass number and the atomic number remain the same.
Which particle completes this equation?

3
RADIOACTIVITY
→ _____ +
An alpha particle
A beta particle
A gamma particle
A positron
A proton
Uranium-238 decays via alpha emission to...

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