5.1 Chemical Bond

What is a chemical bond?

• A) A mixture of different substances

• B) A force of attraction between atoms or ions

• C) A type of chemical reaction

• D) A physical combination of elements

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Why do chemical bonds form?

• A) To create new elements

• B) To make substances taste better

• C) To give atoms a more stable arrangement of electrons

• D) To increase the size of atoms

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What are valence electrons?

• A) Electrons that can be transferred or shared between atoms

• B) Electrons that are only found in compounds

• C) Electrons that do not participate in bonding

• D) Electrons that are found in the nucleus

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What common compound is used as an example to explain why bonds form?

• A) NaCl (table salt)

• B) CO2 (carbon dioxide)

• C) H2O (water)

• D) O2 (oxygen)

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How many valence electrons does a hydrogen atom have?

• 2

• 6

• 1

• 8

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What is the total number of valence electrons in an oxygen atom?

• 2

• 6

• 1

• 8

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What type of bond is formed between the hydrogen and oxygen atoms in a water molecule?

• Ionic bond

• Covalent bond

• Metallic bond

• Hydrogen bond

Which of the following statements is true about the water molecule's oxygen atom?

• Its outer energy level is not full.

• It has a total of six valence electrons.

• It shares one pair of electrons with each hydrogen atom.

• It has a total of one valence electron.

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What does a covalent bond involve?

• The transfer of electrons from one atom to another

• The sharing of a pair of electrons between two nonmetal atoms

• The attraction between two metal atoms

• The attraction between oppositely charged ions

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Which substance contains ionic bonds?

• Water

• Table salt

• Oxygen gas

• Hydrogen gas

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