Additional Concepts in Lewis structure Coordinate bond: a covalent bond in which both electrons are provided by one atom e.g. CO, Lone pair e: a valence e pair without bonding or sharing with other atoms e.g.H2O, NH3, co2 Bond order, Bond length, Bond energy High bond order← Short bond length← High bond energy(requiring more energy to break a bond)Additional Concepts in Lewis Structure  Coordinate bond: a covalent bond in which both electrons are provided by one atom.  e.g. CO,  Lone pair e: a valence e pair without bonding or sharing with other atoms.  e.g. H2O, NH3, CO2.  Bond order, Bond length, Bond energy  High bond order ↔ Short bond length ↔ High bond energy (requiring more energy to break a bond) 9