Chapter 5 Test

Which of the following is NOT true regarding chemical bonds?

• Chemical bonds form compounds that are less stable than the individual atoms involved.
• Chemical bonds can form when atoms gain or lose electrons.
• Chemical bonds can form when atoms share electrons.
• Chemical bonds can form when electrostatic attractions hold atoms together.

The octet rule states that atoms are generally most stable when...

• eight atoms form ring-shaped molecules
• they combine with other elements to form compounds
• they have eight electrons in their valence energy level
• they lose all their valence electrons

The properties of water are different from the properties of hydrogen and oxygen because...

• chemical bonding changes the properties
• hydrogen and oxygen are a gas, and water cannot be a gas
• they consist of different elements
• water is a pure nonreactive element

Two atoms that equally share electrons form a __ bond

• Covalent
• Ionic
• Metallic
• Polar

The electronegativities of the elements in an ionic bond tend to be...

• equal
• similar and high
• similar and low
• very different

How many atoms are represented by the chemical formula CuSO₄?

• 3
• 4
• 6
• 7

Most atoms are unstable when they are not bonded to other atoms.

• True
• False

Molecules form only when different elements bond together

• True
• False

Molecules can be formed by covalent or ionic bonds.

• True
• False

A double covalent bond is weaker than a single bond.

• True
• False