Test On Chapter 25 Nuclear Chemistry

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  • 1/20 Questions

    What are the three main types of nucear radiation?

    • Alpha , beta , gamma
    • Fusion, fission , fassion
    • Half life, radioisotope, scuntillation
    • Transmutation, transuranium, geiger
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About This Quiz

Nuclear Chemistry is quite an interesting field of study, both for the fact that it is scary and informative at the same time. Find out how much you know. If you are prepared to test your knowledge try it out.

Nuclear Chemistry Quizzes & Trivia

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  • 2. 

    ___________ involves changes in the nuclei of the atoms.

    • Chemical reactions

    • Nuclear reactions

    Correct Answer
    A. Nuclear reactions
    Explanation
    Nuclear reactions involve changes in the nuclei of atoms, specifically the breaking apart or combining of atomic nuclei. These reactions result in the release or absorption of large amounts of energy, and can involve the transformation of one element into another. In contrast, chemical reactions involve changes in the arrangement of electrons in atoms, resulting in the formation or breaking of chemical bonds.

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  • 3. 

    How is an atomic number of a nucleus changed by alpha decay?

    • The atomic number decreases by two

    • The atomic number decreases by one

    • The atomic number decreases by three

    • The atomic number decreases by zero

    Correct Answer
    A. The atomic number decreases by two
    Explanation
    During alpha decay, a nucleus emits an alpha particle, which consists of two protons and two neutrons. As a result, the atomic number of the nucleus decreases by two because two protons are being lost. Since the atomic number represents the number of protons in an atom, a decrease in the atomic number indicates a loss of protons. Therefore, the correct answer is that the atomic number decreases by two.

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  • 4. 

    Which of the three kinds of radiation described in this section in the most penetrating?

    • Alpha radiation

    • Gamma radiation

    • Beta radiation

    Correct Answer
    A. Gamma radiation
    Explanation
    Gamma radiation is the most penetrating among the three kinds of radiation. This is because gamma radiation consists of high-energy photons that can easily pass through most materials, including thick layers of concrete or lead. Unlike alpha and beta radiation, which are composed of particles with mass, gamma radiation is electromagnetic in nature and does not carry any charge or mass. This allows it to travel long distances and penetrate deeply into matter, making it the most penetrating form of radiation.

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  • 5. 

    How is the atomic number of a nucleus changed by beta decay?

    • The atomic number increases by threee

    • The atomic number increases by two

    • The atomic number increases by one

    • The atomic number increases by zero

    Correct Answer
    A. The atomic number increases by one
    Explanation
    In beta decay, a neutron in the nucleus is converted into a proton, resulting in an increase in the atomic number by one. This occurs when a beta particle (either an electron or a positron) is emitted from the nucleus. The emission of the beta particle causes the neutron to change into a proton, thereby increasing the atomic number by one. Therefore, the correct answer is that the atomic number increases by one.

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  • 6. 

    Mass numbers must be __________________.

    • Charged

    • Unbalanced

    • Repell

    • Balanced

    Correct Answer
    A. Balanced
    Explanation
    Mass numbers must be balanced. The mass number of an atom is the sum of its protons and neutrons. In a stable atom, the number of protons and neutrons is equal, resulting in a balanced mass number. This balance is crucial for the stability and overall structure of the atom. If the mass numbers were unbalanced, it would lead to an unstable atom, which could result in radioactive decay or other nuclear reactions. Therefore, it is essential for mass numbers to be balanced for the proper functioning of atoms.

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  • 7. 

    How is the atomic number of a nucleus changed by gamma decay?

    • The emission of gamma radiation changes the atomic number by two.

    • The emission of gamma radiation changes the atomic number by one.

    • The emission of gamma radiation does change the atomic number.

    • The emission of gamma radiation does not change the atomic number.

    Correct Answer
    A. The emission of gamma radiation does not change the atomic number.
    Explanation
    Gamma decay is a type of radioactive decay in which a nucleus releases gamma radiation. Unlike alpha and beta decay, gamma decay does not involve the emission of any particles, only high-energy photons. Since the atomic number of an element is determined by the number of protons in its nucleus, and gamma decay does not involve any changes in the number of protons, the emission of gamma radiation does not change the atomic number.

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  • 8. 

    How is the atomic mass number of the nucleus changed by gamma delay?

    • The emission of gamma radiation does change the mass number.

    • The emission of gamma radiation does not change the mass number.

    • The emission of gamma radiation increases the mass number by two.

    • The emission of gamma radiation decreases the mass number.

    Correct Answer
    A. The emission of gamma radiation does not change the mass number.
    Explanation
    Gamma radiation is a type of electromagnetic radiation that is emitted from the nucleus of an atom. Unlike alpha or beta particles, gamma radiation does not have mass or charge. Therefore, when gamma radiation is emitted, it does not change the number of protons or neutrons in the nucleus, and hence it does not change the mass number.

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  • 9. 

    How does an unstable nuclues release energy?

    • By emitting raduation before radioactive decay

    • By emitting raduation after radioactive decay

    • By emitting raduation during radioactive decay

    • By emitting raduation in between radioactive decay

    Correct Answer
    A. By emitting raduation during radioactive decay
    Explanation
    An unstable nucleus releases energy by emitting radiation during radioactive decay. During this process, the nucleus undergoes a spontaneous transformation, resulting in the emission of radiation such as alpha particles, beta particles, or gamma rays. This emission of radiation is a manifestation of the excess energy within the unstable nucleus, which is released in order to attain a more stable state.

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  • 10. 

    What is radiation?

    • The penetrating rays and positive particles emitted by a radioactive source.

    • The penetrating rays and particles emitted by a radioactive source.

    • The non-penetrating rays and particles emitted by a radioactive source.

    • The penetrating rays and particles emitted by a non-radioactive source.

    Correct Answer
    A. The penetrating rays and particles emitted by a radioactive source.
    Explanation
    Radiation refers to the penetrating rays and particles emitted by a radioactive source. These rays and particles can pass through various materials and have the ability to ionize atoms and molecules. This definition distinguishes radiation from non-radioactive sources, as it specifically mentions the emission of particles by a radioactive source.

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  • 11. 

    What makes a nucleus unstable?

    • It has too many or too few neutrons relative to the number of electrons.

    • It has too many or too few neutrons relative to the number of protons.

    • It has too many or too few neutrons relative to the number of neutrons.

    Correct Answer
    A. It has too many or too few neutrons relative to the number of protons.
    Explanation
    A nucleus becomes unstable when it has an imbalance between the number of neutrons and protons. This imbalance can occur when there are either too many or too few neutrons compared to the number of protons. This imbalance disrupts the stability of the nucleus and can lead to radioactive decay or other nuclear reactions in order to achieve a more stable configuration.

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  • 12. 

    What part of an atom undergoes change during radioactive decay?

    • Neutron

    • Electron

    • Proton

    • Nucleus

    Correct Answer
    A. Nucleus
    Explanation
    During radioactive decay, the nucleus of an atom undergoes change. This is because radioactive decay involves the spontaneous transformation of the unstable nucleus of an atom into a more stable configuration. This transformation can result in the emission of particles or energy, causing the nucleus to change its composition and atomic number. The electrons, protons, and neutrons within the atom remain unchanged during this process. Therefore, the correct answer is the nucleus.

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  • 13. 

    How is the atomic mass of a nucleus changed by beta decay?

    • The mass number changes by one

    • The mass number will change

    • The mass number will change by two

    • The mass number does not change

    Correct Answer
    A. The mass number does not change
    Explanation
    Beta decay is a type of radioactive decay in which a beta particle (either an electron or a positron) is emitted from the nucleus. During beta decay, the number of protons in the nucleus changes, but the number of neutrons remains the same. Since the mass number is the sum of protons and neutrons in the nucleus, and the number of neutrons does not change during beta decay, the mass number remains unchanged. Therefore, the correct answer is that the mass number does not change.

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  • 14. 

    ______________involves the transfer or sharing of elcetrons;the nuclei remains unchanged 

    • Nuclear reactions

    • Chemical reactions

    Correct Answer
    A. Chemical reactions
    Explanation
    Chemical reactions involve the transfer or sharing of electrons between atoms or molecules, while the nuclei of the atoms remain unchanged. In a chemical reaction, bonds between atoms are broken and new bonds are formed, resulting in the formation of different substances. This transfer or sharing of electrons is what leads to the rearrangement of atoms and the formation of new compounds. In contrast, nuclear reactions involve changes in the nuclei of atoms, such as nuclear fission or fusion, which result in the release of large amounts of energy.

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  • 15. 

    _________________ worked with Marie and Pierrie to study the ability of uranium salts that had been exposed to sunlight to fog photographic film plates. 

    • Megana

    • March

    • Granger

    • Becquerel

    Correct Answer
    A. Becquerel
    Explanation
    Becquerel worked with Marie and Pierrie to study the ability of uranium salts that had been exposed to sunlight to fog photographic film plates.

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  • 16. 

    How is the atomic mass number of a nucleus changed by alpha decay?

    • Mass number decreases by two

    • Mass number decreases by four

    • Mass number increases by four

    • Mass number increases by two

    Correct Answer
    A. Mass number decreases by four
    Explanation
    During alpha decay, an alpha particle, which consists of two protons and two neutrons, is emitted from the nucleus. Since the alpha particle carries a mass number of four, the mass number of the nucleus decreases by four as it loses these particles. Therefore, the correct answer is that the mass number decreases by four.

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  • 17. 

    What element was named in honor of the Curies and is it radioactive ?

    • Curium, yes

    • Carbon, yes

    • Radium, yes

    • Uranium,yes

    Correct Answer
    A. Curium, yes
    Explanation
    Curium was named in honor of the Curies, a renowned family of scientists who made significant contributions to the field of radioactivity. Curium is indeed a radioactive element.

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  • 18. 

    What particles in an atom are involved in chemical reactions?

    • Nuclei electron

    • Valence electrons

    • Nuclear nucleus

    • Radioisotopes

    Correct Answer
    A. Valence electrons
    Explanation
    Valence electrons are the particles in an atom that are involved in chemical reactions. These are the electrons located in the outermost energy level of an atom and are responsible for the atom's chemical behavior. Valence electrons determine how atoms will bond with other atoms and form compounds. They are the electrons that are either gained, lost, or shared during a chemical reaction, leading to the formation of new substances. Therefore, valence electrons play a crucial role in chemical reactions.

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  • 19. 

    Atomic numbers _________________.

    • Not charged

    • Repell

    • Charge

    • Balanced

    Correct Answer
    A. Charge
    Explanation
    Atomic numbers represent the number of protons in an atom's nucleus. Protons carry a positive charge, so the atomic number indicates the charge of the atom. Therefore, the correct answer is "charge."

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  • 20. 

    Which kind of particle would need to be emitted to balance the equation?

    • Positron

    • Neutron

    • Electron

    • Proton

    Correct Answer
    A. Positron
    Explanation
    A positron would need to be emitted to balance the equation. This is because a positron is the antiparticle of an electron, and when a positron is emitted, it has a positive charge which helps to balance out any excess negative charges in the equation. This ensures that the equation is balanced in terms of both mass and charge.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 03, 2010
    Quiz Created by
    Verdun
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