Chem2 Flashcards
VSEPR and AXE
A linear molecule has two bonds at 180 degree bond angles. A trigonal planar molecule has three bonds at 120 degree bond angles. A tetrahedral molecule has four bonds at a bond angle of 109.5. Lone pairs decrease the bond angle. Carbon is usually central. When an central atom in a molecule with three bonds has a lone pair, the molecule becomes trigonal pyramidal and its bond angle decreases to 107. If it has two, the bond angle becomes 105. If the central atom of a molecule with two bonds has a lone pair it becomes bent. VSEPRs are define by AXE formulas, where the A is the central atom, The subscript of X is the number of bonds that atom has and The subscript of E is it number of lone pairs.
What is melting point linked to
Attraction between molecules
