Atoms and Elements

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The Nucleus

  • Its in the middle of the atom
  • Contains protons and neutrons
  • Protons are positively charged
  • Neutrons have no charge
  • Nucleus has positive charge overall
  • Tiny compared to rest of atom
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The Electrons

  • Move around the nucleus
  • Negatively charged
  • Small but cover a lot of space
  • Occupy shells surrounding nucleus


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Atom in General

  • No charge overall
  • Size of electron and proton charges are the same
  • Number of Protons = Number of Electrons
  • If electrons are added or removed then atom becomes charged
  • A charged atom is called an ion.
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