Unit 3 Bonding Test

Which pair of atoms will combine with each other and form an ionic bond?

• C and O
• C and H
• Ca and Mg
• Ca and Br

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Which element is most likely to gain electrons in a chemical reaction?

• Kr
• K
• Br
• Ca

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Atoms become positive ions by

• Gaining electrons
• Losing electrons
• Gaining protons
• Sharing electrons

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Anions are formed by

• Gaining electrons
• Losing electrons
• Sharing electrons
• None of these

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Which element will most likely form an ionic bond with chlorine?

• O
• N
• S
• K

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How does an atom of aluminum become an ion?

• It gains 3 electrons
• It gains 3 protons
• It loses 3 electrons
• It loses 3 protons

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Electrons involved in the formation of chemical bonds are called

• valence electrons
• chemical electrons
• Lewis electrons
• none of these

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How many electrons are needed in the outer energy levels of most atoms for the atom to be chemically stable?

• 2
• 4
• 6
• 8

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The properties of a compound are _____ the properties of the elements that form it.

• Different from
• Similar to
• Identical to
• Derived from

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All of the atoms below lose electrons EXCEPT

• 
• 
• 
• 

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