Atomic Structure Lesson #2: Historical Development of the Atom
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Questions and Answers

What is the main difference between the atoms of lithium and carbon?

  • Atomic number
  • Atomic mass (correct)
  • Number of electrons
  • Number of protons
  • Which component of an atom has almost no mass?

  • Electron (correct)
  • Nucleus
  • Proton
  • Neutron
  • What do the atomic number and mass number of an element represent?

  • Number of protons and electrons
  • Sum of protons and electrons
  • Sum of protons and neutrons (correct)
  • Number of electrons and neutrons
  • Which term describes a unique number that corresponds to the number of protons in an element?

    <p>Atomic number</p> Signup and view all the answers

    The atomic number of an element is equal to the number of:

    <p>Electrons and protons combined</p> Signup and view all the answers

    What does the mass number of an element represent?

    <p>Total number of particles in the nucleus</p> Signup and view all the answers

    What are the three subatomic particles that make up an atom?

    <p>Proton, neutron, electron</p> Signup and view all the answers

    Which model accurately depicts the structure of an atom?

    <p>Nuclear Model</p> Signup and view all the answers

    What is the name of the dense, positively charged region at the center of an atom?

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

    Which subatomic particle carries a positive charge?

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

    What determines the identity of an element?

    <p>The number of protons</p> Signup and view all the answers

    Which subatomic particle is electrically neutral?

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

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