What type of bond is formed when atoms share pairs of electrons?

• Ionic bond

• Covalent bond

• Metallic bond

• Hydrogen bond

What is a characteristic of covalent bonds between atoms?

• They are weak

• They are strong

• They are temporary

• They are easily broken

Covalently bonded substances may consist of which of the following?

• Large molecules only

• Small molecules only

• Small molecules or large molecules

• Only giant structures

Which of the following is an example of a giant covalent structure?

• Water

• Ammonia

• Diamond

• Poly(ethene)

What is the chemical formula for ammonia?

• NH

• NH₂

• NH₃

• NH₄

Which of the following is a polymer?

• Water

• Ammonia

• Poly(ethene)

• Diamond

Which of the following substances is represented by the chemical formula H₂O?

• Ammonia

• Water

• Diamond

• Poly(ethene)

What type of substances can covalently bonded substances form?

• Only small molecules

• Only large molecules

• Small molecules, large molecules, and giant structures

• Only giant structures

Which of the following is NOT a covalent bond?

• H₂O

• NH₃

• NaCl

• CH₄

Which of the following is a property of covalent bonds?

• They are formed by the transfer of electrons

• They are formed by the sharing of electrons

• They are formed by the loss of electrons

• They are formed by the gain of electrons