C2 1.1 - Chemical Bonding

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  • Chemical Bonding
    • Covalent
      • Non-metallic elements
      • Join by sharing electrons
    • Ionic
      • Metallic and non-metallic
      • Metal atoms lose electrons to form positive ions
      • Atoms of non-metals gain electrons to form negative ions
      • Ions have stable structure of a noble gas
      • Oppositely charged ions attract each other in the compound
    • When 2+ elements react together, compounds are formed
      • Atoms join in two ways
        • Sharing electrons
        • Transferring electrons
    • Group number = number of electrons in outer shell
      • Group 1 - 1 electron in outer shell
      • Group 7 - 7 electrons in outer shell

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