Classes of Chemical Bonds

How do covalent bonds form?

• Valence electrons are transferred between atoms

• Opposite slight charges attract each other between compounds.
• Scientists are still not sure how they form.
• Valence electrons are shared between atoms

Which of the following is NOT formed by a covalent bond?

• K₂S
• H₂O
• I₂
• CO₂

Covalent bonds are between ______ atoms.

• metal and non-metal

• non-metal and non-metal

• metal and metal

Ionic bonds are between...

• Metal and Non-metal
• Non-metal and Non-metal
• Metal and Metal

What type of bond will be present in the compound NaBr?

• Ionic
• Covalent
• Metallic

What type of bond will be present in the compound H₂O?

• Ionic
• Covalent
• Metallic

Name the type of bonding in which the electrons are shared.

• Ionic bonding

• Covalent bonding

• Metallic bonding

What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal and 1 Metal
• 2 Metals
• 2 Noble Gases

When two nonmetals do not share electrons evenly, the resulting covalent bond will be

• nonpolar

• polar

• ionic

• metallic

According to the octet rule most elements need _______ valence electrons.

• 2
• 8
• 6
• 18