important ch. 2 stuff Flashcards
Define Bond Energy
the energy required to overcome the attraction and is defined as the standard enthalpy change for breaking the bond in 1 mol of gaseous molecules
what happens when bond order increases
bond length decreases, bond energy increases
define electronegativity
the ability of an atom bonded with a molecule to attract shared electrons to itself
what is the trend of electronegativity in periods/groups
EN increases across a period
EN decreases down a group
*F is the most electronegative
how is EN related to ionic & covalent character
increse EN: higher ionic behaviour
decrease EN: bond becomes more covalent
*need to look at the EN difference
how does EN affect polarity
the bigger the EN difference in a bond, the more polar it is