Differentiate between covalent
and ionic bonds. Hint: What
is going on with the electrons
in each type of bond?
•In covalent bonds, electrons are
•In ionic bonds, one atom donates
its electrons, becoming a positive
ion. The other atom accepts the
electrons, becoming a negative ion.
The ions of opposite charges are
then attracted to one another.
Water is referred to as a
__________ molecule because
it has an unequal distribution of
No! Lipids do not dissolve in
water because they are nonpolar.
Ionic compounds and polar
molecules dissolve best in water.
Did the paperclip float?
Explain what water properties
contributed to the results we
saw in the lab.
It did not float. It sat on top of
the water due to water’s surface
tension. Surface tension is the
result of cohesion between
water molecules. Cohesion or
sticking together of water
molecules is caused by
Differentiate between acids and
bases. Hint: What ions are
released in water and what are
their pH values.
•Acids form H+ when dissolved in
water which combine with H2O to
form H3O . Acids have more H3O
than OH . They have pH values
•Bases form OH- ions when
dissolved in water. Bases have more
OH- than H3O+. They have pH values