Understanding Water Molecules and Hydrogen Bonds

Water molecules are polar due to unequal electron sharing, with oxygen pulling electrons more strongly than hydrogen. This polarity causes water molecules to attract each other, forming hydrogen bonds. These bonds, though weak and short-lived, require significant energy to break, contributing to water's high heat capacity, boiling point, and surface tension.

What causes the oxygen atom in a water molecule to have a slight negative charge?

• Water molecules are non-polar.

• Hydrogen atoms lose electrons to oxygen.

• Oxygen has more protons than hydrogen.

• Oxygen pulls shared electrons closer to itself.

Why is a water molecule considered polar?

• It has an equal distribution of electrons.

• It contains only hydrogen atoms.

• It has a symmetrical shape.

• It has a positive and a negative side due to unequal electron sharing.

What type of bond forms between water molecules due to their polarity?

• Hydrogen bond

• Ionic bond

• Covalent bond

• Metallic bond

How many other water molecules can a single water molecule form hydrogen bonds with?

• Two

• Three

• Four

• Five

What property of water is explained by the collective strength of hydrogen bonds?

• Low freezing point

• High surface tension

• Weak heat capacity

• Low boiling point