Atomic Theory & Periodic Table

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| By Mhagerty
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Mhagerty
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Quizzes Created: 8 | Total Attempts: 6,451
Questions: 15 | Attempts: 944

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Atomic Theory & Periodic Table - Quiz

This quiz covers the atomic theory including its history as well as how to use the periodic table to calculate #s of subatomic particles.


Questions and Answers
  • 1. 

    Protons can be found in at atom's ___________________. 

    Correct Answer(s)
    nucleus
    Explanation
    Protons are subatomic particles with a positive charge. They are located in the nucleus of an atom, along with neutrons. The nucleus is the central core of the atom, where most of its mass is concentrated. Electrons, which are negatively charged particles, orbit around the nucleus in electron shells. Therefore, the correct answer is "nucleus" because that is where protons can be found in an atom.

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  • 2. 

    Neutrons can be found in an atom's ____________________. 

    Correct Answer(s)
    nucleus
    Explanation
    Neutrons can be found in an atom's nucleus. The nucleus is the central part of an atom that contains protons and neutrons. Protons have a positive charge, while neutrons have no charge. Together, protons and neutrons form the nucleus, which is surrounded by electrons in the electron cloud. Neutrons play a crucial role in determining the stability and mass of an atom.

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  • 3. 

    ____________________ can be found rotating in circular orbits outside an atom's nucleus. 

    Correct Answer(s)
    electron
    electrons
    Explanation
    Electrons can be found rotating in circular orbits outside an atom's nucleus.

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  • 4. 

    How many electrons can fit in the FIRST electron shell/orbital? 

    • A.

      1

    • B.

      2

    • C.

      3

    • D.

      4

    • E.

      8

    Correct Answer
    B. 2
    Explanation
    The first electron shell/orbital can hold a maximum of 2 electrons. This is because the first shell consists of only one subshell, which is the s subshell. The s subshell can hold a maximum of 2 electrons.

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  • 5. 

    How many electrons can fit into any electron shell/orbital EXCEPT the first? 

    • A.

      1

    • B.

      2

    • C.

      3

    • D.

      4

    • E.

      8

    Correct Answer
    E. 8
    Explanation
    In any electron shell or orbital except the first, a maximum of 8 electrons can fit. This is based on the principle that each shell has a maximum capacity for electrons, and the second and subsequent shells can accommodate a maximum of 8 electrons. The first shell, however, can only hold a maximum of 2 electrons. Therefore, the correct answer is 8.

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  • 6. 

    Number of protons is always equal to the number of ___________________ in an uncharged atom (check ALL that are true). 

    • A.

      Atomic number

    • B.

      Prions

    • C.

      Neutrons

    • D.

      Electrons

    Correct Answer(s)
    A. Atomic number
    D. Electrons
    Explanation
    The number of protons in an atom is equal to the atomic number, which is a unique identifier for each element. Electrons, on the other hand, balance out the positive charge of protons and are also present in equal numbers in an uncharged atom. Therefore, both the atomic number and electrons are correct answers to this question.

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  • 7. 

    The only subatomic particle that is NOT always equal to at atom's atomic number is ____________________. 

    Correct Answer(s)
    neutron
    neutrons
    Explanation
    The atomic number of an atom represents the number of protons in its nucleus. Neutrons, on the other hand, are subatomic particles that do not have a charge. While the number of protons (and therefore the atomic number) remains constant for a given element, the number of neutrons can vary, resulting in different isotopes of the same element. Therefore, the correct answer is neutron/neutrons, as they are the only subatomic particles that are not always equal to an atom's atomic number.

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  • 8. 

    It is possible to predict the exact speed and location of an electron. 

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    According to Heisenberg's uncertainty principle, it is not possible to simultaneously predict the exact speed and location of an electron. This principle states that there is a fundamental limit to the precision with which certain pairs of physical properties of a particle, such as position and momentum, can be known. Therefore, it is not possible to predict the exact speed and location of an electron.

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  • 9. 

    _______________________ is the scientist who thought that atoms were "tiny, indestructable spheres" according to our video. 

    Correct Answer
    Dalton
    Explanation
    Dalton is the scientist who believed that atoms were "tiny, indestructible spheres" based on the information provided in the video.

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  • 10. 

    ___________________ is the scientist who came up with the "Plum Pudding Model" to describe atomic structure. 

    Correct Answer
    Thompson
    Explanation
    Thompson is the scientist who came up with the "Plum Pudding Model" to describe atomic structure. This model proposed that atoms are made up of a positively charged sphere with negatively charged electrons embedded within it, similar to plums in a pudding. Thompson's model was significant in understanding the structure of atoms and laid the foundation for further research in atomic theory.

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  • 11. 

    _____________________ is the scientist who first coined the term 'nucleus' after his famous experiment shooting small particles at a sheet of gold foil. 

    Correct Answer
    Rutherford
    Explanation
    Rutherford is the scientist who first coined the term 'nucleus' after his famous experiment shooting small particles at a sheet of gold foil.

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  • 12. 

    _____________________ is the scientist who originally proposed that electrons move in 'orbits' around the nucleus. 

    Correct Answer
    Bohr
    Explanation
    Bohr is the scientist who originally proposed that electrons move in 'orbits' around the nucleus. This theory, known as the Bohr model, revolutionized the understanding of atomic structure. According to Bohr, electrons occupy specific energy levels or shells, and they can jump between these levels by absorbing or emitting energy. This model provided a framework for explaining the stability of atoms and the emission and absorption of light. Bohr's work laid the foundation for the development of quantum mechanics and had a significant impact on the field of atomic physics.

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  • 13. 

    __________________________ is the scientist who has an "Uncertainty Principle" named after him, because he proposed that it is impossible to determine both the exact velocity and location of an electron. 

    Correct Answer
    Heisenberg
    Explanation
    Heisenberg is the scientist who proposed the "Uncertainty Principle," which states that it is impossible to determine both the exact velocity and location of an electron.

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  • 14. 

    Chlorine's atomic number is 17 and its atomic mass is 35.  It must have ______ protons __________ neutrons and _______ electrons. (list all 3 numbers in a row with 1 space in between each). 

    Correct Answer
    17 18 17
    Explanation
    Chlorine's atomic number is 17, which represents the number of protons in its nucleus. The atomic mass is 35, which is the sum of protons and neutrons. Therefore, chlorine must have 17 protons, 18 neutrons (35-17), and 17 electrons, as the number of protons and electrons in an atom are equal.

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  • 15. 

    Scandium's atomic number is 21 and its atomic mass is 45.  It must have _____ protons, _____ neutrons, and _____ electrons. (list all 3 numbers in a row with 1 space in between each).

    Correct Answer
    21 24 21
    Explanation
    Scandium's atomic number represents the number of protons in its nucleus, so it must have 21 protons. The atomic mass is the sum of protons and neutrons, so subtracting the atomic number from the atomic mass gives us the number of neutrons, which is 24. Since atoms are electrically neutral, the number of electrons is equal to the number of protons, which is also 21.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Sep 21, 2011
    Quiz Created by
    Mhagerty
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