8.5 ELECTRONEGATIVITY
AND POLARITY
Metals have aLOW HIGHelectronegativity.
Nonmetals have aLOW HIGHelectronegativity.
The character and type of bond can be predicted using the
________________________________ between the two elements that are bonded together.
A chemical bond is always completely ionic or covalent
TRUE OR FALSE??
chargeson atoms Na F
E.N. = 0.9 4.0
difference in E.N. = _______
chargeson atoms
C ------ F
E.N. = 2.5 4.0
difference in E.N. = ______
ElectronegativityDifference
Type of Bond
Textbook’s version :4 choices
Version we’ll use:3 choices
BOND DIFFERENCE INELECTRO-NEGATIVITY
BOND TYPE
C - C
C - H
ALCOHOLS SOLUBILITY IN H2 O(mol/100 g H2 O)
CH3OH (methanol) ∞
CH3CH2OH (ethanol) ∞
CH3CH2CH2OH (propanol) ∞
CH3CH2CH2CH2OH (butanol)0.11
CH3CH2CH2CH2CH2OH (pentanol)0.030
CH3CH2CH2CH2CH2CH2OH (hexanol)0.0058
In a chemical change, which type of molecular bonding is broken?
Also, what can you deduce about the properties of the Wicked Witch, based on this incident?