Giant Covalent Structures

Which substance has very large molecules?

• Oxygen
• Water
• Polymers
• Sodium Chloride

What are the intermolecular forces like between polymer molecules?

• Weak so they are solid at room temperature
• Weak so they are gas at room temperature
• Strong so they are solid at room temperature
• Strong so they are gas at room temperature

What type of structure do substances like diamond and silicon dioxide have?

• Ionic structure
• Metallic structure
• Giant covalent structure
• Molecular structure

What type of bonds must be overcome to melt or boil giant covalent structures?

• intermolecular forces

• Covalent bonds

Why do substances with giant covalent structures have very high melting points?

• lots of energy is needed to overcome strong metallic bonds

• lots of energy is needed to overcome strong ionic bonds

• lots of energy is needed to overcome strong covalent bonds

• lots of energy is needed to overcome strong intermolecular forces

Giant covalent structures are solids at room temperature because lots of _____ is needed to overcome strong covalent bonds