Exploring Ionic and Covalent Bonds

What makes diamond the hardest substance on Earth?

• It has no bonds between carbon atoms.

• It has two bonds between carbon atoms.

• It has one bond between carbon atoms.

• It has four bonds between carbon atoms.

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What type of bond involves the transfer of electrons from one atom to another?

• Hydrogen bond

• Ionic bond

• Metallic bond

• Covalent bond

In the formation of sodium chloride, what happens to the outer shell electron of sodium?

• It is donated to chlorine.

• It is lost to the environment.

• It remains with sodium.

• It is shared with chlorine.

What is an ion?

• An atom with no electrons

• An atom with a complete outer shell

• An electrically charged atom

• A neutral atom

How can ionic bonds be easily broken?

• By adding heat

• By adding water

• By adding light

• By adding pressure

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What type of bond involves the sharing of electrons between atoms?

• Ionic bond

• Covalent bond

• Metallic bond

• Hydrogen bond

How many electrons does oxygen need to complete its outer shell?

• Two

• Three

• One

• Four

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NGSS.MS-PS1-1

What is the most stable compound formed by hydrogen and oxygen?

• H2

• O2

• H2O

• HO

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NGSS.MS-PS1-1

What happens to the electrons when a covalent bond is broken?

• They stay with the original atoms.

• They are lost to the environment.

• They form new bonds with other atoms.

• They are transferred to other atoms.

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What do hydrogen atoms form when they combine with each other?

• HO

• H2O

• O2

• H2

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