chem lesson 6

• Ionic Bonding


  Ionic bonds form between metals and non-metals
• Ionic bonding


  • Metal atoms lose electrons to form positive ions
  • Non-metal atoms gain electrons to form negative ions
  • The oppositely charged ions attract one another
• Covalent Bonding


  • Covalent bonds form between non-metal atoms
  • Covalent bonds involve sharing a pair of electrons
• Naming Molecular (Covalent) Compounds


  • Molecular compounds are composed of a non-metal bonded to another non-metal
  • Some molecular compounds have common names which you should know
  • For most molecular compounds, prefixes are used because the elements can form different combinations
• Prefixes used in naming molecular compounds

  • mono-
  • di-
  • tri-
  • tetra-
  • penta-
  • hexa-
• Bonding in Molecular Compounds

  Electrons are shared
• Formulas of Elements


  • Monoatomic (single atoms)
  • Diatomic (pairs of atoms)
• Mneumonics: HOFBrINCl or HON17 (HON and Group 17)
• Formulas of elements


  • Neon
  • Fluorine
  • Oxygen
  • Beryllium