Master the Periodic Table
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Questions and Answers

Which subatomic particle is responsible for the unique properties of elements?

  • Protons
  • Electrons (correct)
  • Neutrons
  • All of the above
  • What is the atomic number?

  • The total number of subatomic particles in an atom
  • The combined number of protons and neutrons in an atom
  • The number of protons in the nucleus (correct)
  • The number of electrons in an atom
  • What is the atomic mass number?

  • The total number of subatomic particles in an atom
  • The number of protons in the nucleus
  • The number of neutrons in an atom
  • The combined number of protons and neutrons in an atom (correct)
  • What are isotopes?

    <p>Atoms with different atomic mass numbers</p> Signup and view all the answers

    How many elements are found on Earth?

    <p>About ninety</p> Signup and view all the answers

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