Chemistry: Atomic Theory Quiz 1a

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  • 1/5 Questions

    A positively charged subatomic particle is

    • Proton
    • Mass Number
    • Element Number
    • Neutron
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About This Quiz

Explore foundational concepts of atomic structure with Chemistry: Atomic Theory Quiz 1A. Assess your understanding of subatomic particles, isotopes, and historical atomic models. Ideal for students enhancing their chemistry knowledge and preparing for advanced studies.

Atomic Theory Quizzes & Trivia

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  • 2. 

    Atoms with the same number of protons but different numbers of neutrons are:

    • Isotopes

    • Protrons

    • Relative Abundance

    • Neutrons

    Correct Answer
    A. Isotopes
    Explanation
    Atoms with the same number of protons but different numbers of neutrons are called isotopes. Isotopes have the same atomic number (number of protons) but different mass numbers (sum of protons and neutrons). This means that isotopes of an element have the same chemical properties but different physical properties, such as atomic mass. Isotopes can have different stability and may undergo radioactive decay.

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  • 3. 

    He said that the atom resembles a tiny rock.

    • Thomson

    • Bohr

    • Democritus

    • Dalton

    Correct Answer
    A. Democritus
    Explanation
    Democritus is the correct answer because he was the first to propose the idea of atoms. He believed that atoms were indivisible and indestructible particles that make up all matter. By comparing atoms to tiny rocks, he was emphasizing their solid and fundamental nature. Thomson, Bohr, and Dalton also made significant contributions to atomic theory, but Democritus was the first to suggest the existence of atoms.

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  • 4. 

    Choose the statement that is FALSE.

    • None of them below

    • Electrons have the mass of 1 amu

    • Protons have the mass of 1amu

    • Neutrons have the mass of 1 amu

    Correct Answer
    A. Electrons have the mass of 1 amu
    Explanation
    The statement "electrons have the mass of 1 amu" is false. Electrons have a much smaller mass compared to protons and neutrons. In fact, the mass of an electron is approximately 1/1836 amu, which is significantly lighter than 1 amu.

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  • 5. 

    A subatomic particle with no charge is:

    • Proton

    • Electron

    • Neutron

    • Some type of "tron"

    Correct Answer
    A. Electron
    Explanation
    An electron is a subatomic particle with no charge. It is negatively charged and orbits around the nucleus of an atom. Protons, on the other hand, carry a positive charge, while neutrons have no charge at all. The option "Some type of 'tron'" is not a valid subatomic particle and does not exist.

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  • Mar 22, 2023
    Quiz Edited by
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  • Apr 21, 2010
    Quiz Created by
    Cbethel14
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