Polar and Nonpolar Molecules

The attraction that an atom has for shared electrons in bonds is

• electron affinity.

• electronegativity.

• electropositivity.

• electromagnetism.

Excluding the Noble gas family, where on the Periodic Table are the elements with the highest electronegativity located?

• upper right

• lower right

• upper left

• lower left

Phosphorus has an electronegativity value of 2.1. Chlorine's electronegativity value is 3.0. What type of bond will these two elements form?

• ionic

• nonpolar covalent

• polar covalent

• metallic

Tags

NGSS.HS-PS1-1

When two atoms of the same nonmetal element bond together, they form a(n)

• ionic bond.

• nonpolar covalent bond.

• polar covalent bond.

• James Bond.

Which of the following pairs of elements is most likely to form an ionic bond? (You should refer to a Periodic table.)

• sulfur and oxygen

• sulfur and fluorine

• sodium and sulfur

• oxygen and fluorine

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

True or False: Molecules that contain polar bonds are always polar.

• True

• False

In order to determine if a molecule is polar, you must consider the

• polarity of bonds and symmetry of the molecule.

• number of electrons and number of bonds.

• polarity of bonds only.

• total charge of each ion and number of multiple bonds.

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.

Tags

NGSS.HS-PS2-6

All of the following molecules have polar bonds. Which of the following molecules IS NOT polar? (You might need to draw Lewis structures.)

• H₂0

• NH₃

• CH₄

• CH₃F

Tags

NGSS.HS-PS1-1

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.