important ch. 2 stuff Flashcards
1
Q
Define Bond Energy
A
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
2
Q
what happens when bond order increases
A
bond length decreases, bond energy increases
3
Q
define electronegativity
A
the ability of an atom bonded with a molecule to attract shared electrons to itself
4
Q
what is the trend of electronegativity in periods/groups
A
EN increases across a period
EN decreases down a group
*F is the most electronegative
5
Q
how is EN related to ionic & covalent character
A
increse EN: higher ionic behaviour
decrease EN: bond becomes more covalent
*need to look at the EN difference
6
Q
how does EN affect polarity
A
the bigger the EN difference in a bond, the more polar it is
