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

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2
Q

what happens when bond order increases

A

bond length decreases, bond energy increases

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3
Q

define electronegativity

A

the ability of an atom bonded with a molecule to attract shared electrons to itself

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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

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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

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6
Q

how does EN affect polarity

A

the bigger the EN difference in a bond, the more polar it is

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