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Elements & Atoms

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  • The nucleus contains
    Protons and neutrons
  • Oxygen has an atomic number of
    8
  • The neutron carries what charge?
    Neutral or no charge
  • Isotopes have different numbers of what?
    Neutrons
  • This is the unique identifier for an element's atom
    atomic # or number of protons
  • If Magnesium is a neutral atom, how many electrons does it have?
    12
  • Protons have what charge?
    Positive
  • The mass number of Iron is
    55.845 or 56
  • Which are bigger Protons or Electrons?
    Protons
  • Which as more protons Calcium or Krypton?
    Krypton 35
  • How many neutrons does Nitrogen have?
    14 - 7 = 7
  • An element's atomic number tells us the number of
    Protons
  • Where are Electrons found?
    In electron clouds around the nucleus
  • What element has a mass number of 20amu?
    Neon
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