Chemistry Unit One

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  • ionic compounds are formed when atoms lose or gain electrons to form a full outer shell and become stable.
    • When elements react their atoms join to form compounds.
      • in a reaction the mass of the reactants and the products is equal
    • metal atoms lose electrons to become positive ions
      • non-metal atoms gain electrons to become negative ions
        • the strong electrostatic forces between the positive and negative ions bonds the atoms (ionic bonding)
          • metal atoms lose electrons to become positive ions
            • non-metal atoms gain electrons to become negative ions
              • the strong electrostatic forces between the positive and negative ions bonds the atoms (ionic bonding)
      • covalent bonds are formed when electrons are shared between two metal atoms.

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