Chemistry: Atomic Structure and Periodic Table
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Questions and Answers

What is the atomic number of an element?

  • The number of electrons in an atom's nucleus
  • The number of protons in an atom's nucleus (correct)
  • The total number of protons and neutrons in an atom
  • The sum of protons and neutrons in an atom's nucleus

    • Which subatomic particle carries a positive charge and determines the atom's identity?

  • Electron
  • Meson
  • Neutron
  • Proton (correct)

    • What does the mass number of an atom represent?

  • The sum of protons and neutrons in an atom's nucleus (correct)
  • The number of electrons in an atom's nucleus
  • The total number of protons and neutrons in an atom
  • The number of protons in an atom's nucleus

    • What are isotopes?

    <p>Atoms of the same element with different numbers of neutrons</p> Signup and view all the answers

    What is the role of neutrons in an atom's nucleus?

    <p>Stabilize the nucleus and affect the atom's mass</p> Signup and view all the answers

    What is the mass and charge of a neutron?

    <p>Mass = 1 amu, Charge = 0 (neutral)</p> Signup and view all the answers

    What term is used to describe atoms of the same element with a different number of neutrons?

    <p>Isotopes</p> Signup and view all the answers

    What is the average relative atomic mass (Ar) of chlorine given the following isotopic abundances: Cl-35 (75%) and Cl-37 (25%)?

    <p>35.5</p> Signup and view all the answers

    Which particle does not have any charge?

    <p>Neutron</p> Signup and view all the answers

    What effect do neutrons have on the physical properties of an element?

    <p>They affect only the mass and physical properties of the element</p> Signup and view all the answers

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