C1.2.1 The Structure of an Atom

    Cards (22)

    • What is the smallest unit of an element that retains its chemical properties?
      Atom
    • Electrons have a relative mass of 1.
      False
    • Electrons orbit the nucleus in specific energy levels known as electron shells
    • What is the charge of a neutron?
      0
    • Where do protons reside in an atom?
      Nucleus
    • Match the subatomic particle with its properties:
      Protons ↔️ +1 charge, mass 1
      Neutrons ↔️ 0 charge, mass 1
      Electrons ↔️ -1 charge, negligible mass
    • Protons and neutrons reside in the central nucleus
    • Neutrons have a charge of -1.
      False
    • The mass number is the total number of protons and neutrons
    • What are isotopes of the same element defined as?
      Same protons, different neutrons
    • Order the energy levels of an atom from closest to farthest from the nucleus:
      1️⃣ n=1
      2️⃣ n=2
      3️⃣ n=3
      4️⃣ n=4
    • Protons and neutrons are located in the central core of the atom called the nucleus
    • What is the charge of a proton?
      +1
    • Neutrons have a negative charge.
      False
    • Electrons have a charge of -1
    • Electrons orbit the nucleus in fixed circular paths.

      True
    • What are the three main subatomic particles that make up an atom?
      Protons, neutrons, electrons
    • Where are protons and neutrons located in an atom?
      Nucleus
    • What is the atomic number of an element defined as?
      Number of protons
    • Match the term with its definition:
      Atomic Number ↔️ Number of protons in the nucleus
      Mass Number ↔️ Total number of protons and neutrons
    • Isotopes of the same element have identical physical and chemical properties.
      False
    • What is the maximum number of electrons that the first energy level (n=1) can hold?
      2