Polar Molecules

A molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons is a _______________.

• nonpolar molecule

• polar molecule

• ionic compound

• metalic compound

Polar molecules have

• no charges.

• slight positive and negative charges on opposite ends of the molecules.

• only positive charges.

• either positive or negative charges, but not both.

Atoms of a polar molecule share their atoms ___________.

• Equally

• Unequally

Polar molecules will dissolve in other polar molecules and nonpolar molecules will dissolve in other nonpolar molecules.

• True

• False

According to the table which solute is nonpolar.

• ammonium chloride

• naphthalene

• ethanol

• urea

Attractions between polar molecules are stronger than attractions between nonpolar molecules.

• true

• false

Is the molecule CCl₄  polar or non-polar?

• polar

• non-polar

Why is it difficult to wash oil from your hands with plain water?

• Both substances are polar. Like polarities repel.

• Both substances are nonpolar. Like polarities repel.

• Water is nonpolar, and oil is polar, so they will not combine.

• Water is polar, and oil is nonpolar, so they will not combine.

The boiling point of polar molecules is __________ the boiling point of nonpolar molecules.

• lower than

• equal to

• higher than

The attractions between water molecules are called a __________________.

• gravity force

• dipole force

• nuclear force

• I don't know!