Chapter 18 Chemical Bonds Review

An ion is ____

• an atom that has equal number of protons and electrons

• a charged particle that has either more or fewer electrons than protons

• an atom that has equal number of neutrons and protons

• an atom that is nonreactive (inert)

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An ion of aluminum will have which of the following:

• 13 protons and 13 electrons

• 10 protons and 13 electrons

• 10 protons and 10 electrons

• 13 protons and 10 electrons

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Compounds that share electrons to form bonds are known as ____

• ionic bonds

• metallic bonds

• covalent bonds

• james bond

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Which of these BEST explains why an ionic bond will most likely be formed between a metal and a nonmetal?

• An ionic bond forms between oppositely charged ions; metals and nonmetals are likely to be oppositely charged.

• An ionic bond forms when two atoms share electrons; a metal and nonmetal are likely to share electrons.

• An ionic bond forms when one of the atoms is nonreactive; metals tend to be nonreactive and form ionic bonds.

• An ionic bond forms when one of the atoms is nonreactive; nonmetals tend to be nonreactive and form ionic bonds.

A calcium ion contains the following:

• 20 protons and 20 neutrons

• 19 protons and 19 electrons

• 20 protons and 19 electrons

• 19 protons and 19 electrons

The chemical formula for water, H₂O, means that each water molecule contains which of the following?

• Two hydrogen atoms and two oxygen atoms.

• One hydrogen atom and two oxygen atoms.

• Two hydrogen atoms and one oxygen atom

• It's difficult to determine

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In which type of bond do atoms transfer electrons?

• polyatomic ions

• metallic bonds

• ionic bonds

• covalent bonds

In which type of bond do atoms share electrons?

• polyatomic ions

• metallic bonds

• ionic bonds

• covalent bonds

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NGSS.HS-PS1-1

Which of these BEST explains why a covalent bond will most likely be formed between a nonmetal and a nonmetal?

• A covalent bond forms between oppositely charged ions; nonmetals and nonmetals are likely to be oppositely charged.

• A covalent bond forms when two atoms share electrons; a nonmetal and nonmetal are likely to share electrons.

• A covalent bond forms when one of the atoms is nonreactive; nonmetals tend to be nonreactive and form covalent bonds.

• A covalent bond forms when one of the atoms is nonreactive; metals tend to be nonreactive and form covalent bonds.

What is the chemical formula for the ionic compound formed between aluminum and oxygen atoms?

• Al₃O₃

• Al₂O₃

• Al₂O₂

• Al₃O₂

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