Chemistry Quiz on Atomic Structure
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Questions and Answers

Which subatomic particle is the heaviest?

  • Neutron (correct)
  • Photon
  • Electron
  • Proton
  • What defines an isotope of an element?

  • Different number of neutrons (correct)
  • Different atomic mass
  • Different number of protons
  • Different number of electrons
  • How many valence electrons does an element in Group 16 have?

  • 6 (correct)
  • 2
  • 8
  • 4
  • What is the octet rule?

    <p>Atoms generally desire a full outer shell of electrons. (C)</p> Signup and view all the answers

    What does the atomic number of an element represent?

    <p>The number of protons in the nucleus (D)</p> Signup and view all the answers

    What is the molar mass of water (H₂O)?

    <p>18 g/mol (B)</p> Signup and view all the answers

    Which type of ion has more electrons than protons?

    <p>Anion (A)</p> Signup and view all the answers

    Which of the following correctly describes the shape of a p orbital?

    <p>Dumbbell-shaped (D)</p> Signup and view all the answers

    Flashcards

    Atomic Number

    The number of protons in the nucleus of an atom. It determines the element's identity.

    Atomic Mass

    The average mass of an atom of an element, taking into account the abundance of its isotopes.

    Isotopes

    Atoms of the same element with the same number of protons but different numbers of neutrons.

    Atom

    The smallest unit of an element that retains the chemical properties of that element. Composed of protons, neutrons, and electrons.

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    Proton

    The positively charged subatomic particle found in the nucleus of an atom. It determines the element's identity.

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    Neutron

    The neutral subatomic particle found in the nucleus of an atom. It contributes to an atom's mass but has no charge.

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    Electron

    The negatively charged subatomic particle that orbits the nucleus of an atom. It is responsible for chemical bonding.

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    Cation

    A positively charged ion formed by losing electrons.

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