Chemistry UNIT 1.4

• Ionic bonding is metal and non-metal, formed by the electron attraction between positive and negative ions
• Covalent bonding is non-metals, two atoms both give one electron
• Coordinate bonding both shared electrons come from one of the electrons
• Metallic bonding is the electrostatic forces of attraction between the nucleus of the positive ions and the delocalised electrons
• Electronegativity is the measure of the electron attracting power of an atom in a covalent bond
• Non Polar- <0.4
• Polar covalent- 0.4 to 1.9
• Ionic- >2.0
• Intermolecular bonding is a Weak bonding holding the molecule together
• Intramolecular bonding is a Strong bonding holding the molecule together
• Linear, 180- 2 bonding pairs, 0 lone pairs
• Trigonal planar, 120- 3 bonding pairs, 0 lone pairs
• Tetrahedral, 109.5- 4 bonding pairs, 0 lone pairs
• Pyramidal, 107- 3 bonding pairs, 1 lone pair
• Non-linear, 104.5- 2 bonding pairs, 2 lone pairs
• Trigonal bipyramidal, 120 and 90- 5 bonding pairs, 0 lone pairs