Mass number, atomic number, and iso

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Created by
Leannah Tasnim

Cards (8)

  • What is the atomic number of an atom?
    The number of protons in an atom. It determines the element.
  • What is the mass number of an atom?
    The total number of protons and neutrons in an atom.
  • How do you calculate the number of neutrons in an atom?
    Neutrons = mass number - atomic number
  • Why do atoms have no overall charge?
    The number of protons (+1 charge) equals the number of electrons (-1 charge), so the charges cancel out.
  • What are isotopes?
    Atoms of the same element with the same number of protons but different numbers of neutrons.
  • Do isotopes of an element have the same chemical properties? Why?
    Yes, because they have the same number of electrons, which determine chemical behavior.
  • What is an ion?
    An atom that has gained or lost electrons, giving it an overall charge.
  • What is the size of an atom?
    About 1 x 10^-10m (0.1 nanometers).