Chemical Bonds Practice Quiz

How many valence electrons are in an atom of aluminum?

• 13

• 3

• 4

• 5

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Which of the following occurs in an ionic bond?

• valence electrons are shared

• Two atoms share two electrons.

• Oppositely charged ions attract.

• Like-charged ions attract.

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In covalent bonds, the valence electrons

• are shared evenly between the atoms

• are shared, but attracted more to the element with the lower electronegativity

• transfer from the metal to the nonmetal

• are shared, but attracted to the element with the higher electronegativity

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Which of the following pairs of elements is most likely to form an ionic compound?

• potassium and sodium

• nitrogen and sulfur

• oxygen and chlorine

• magnesium and fluorine

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What characteristic of metals makes them good electrical conductors?

• Their crystal structures can be rearranged easily.

• They have mobile protons that move around.

• They have mobile ions that float around.

• They have mobile valence electrons.

Ionic bonds form between...

• nonmetals with the same electronegativity

• nonmetals with different electronegativity

• metals and nonmentals

• metals

What is the name for an ion with a positive charge?

• cation
• anion
• onion
• union

If an atom loses two electrons what charge will it have?

• -2
• -1
• +1
• +2

How many electrons does nitrogen have in its Lewis dot diagram?

• 1

• 3

• 4

• 5

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NGSS.HS-PS1-1

When sodium and oxygen react and bond, the chemical formula of the compound that forms is:

• NaO

• NaO₂

• Na₂O₂

• Na₂O

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