Benchmark-3 Mock Exam (G7 Rn / Ga / Lv / Xe)

In an ionic bond the metal will:

• Lose electrons

• Lose protons

• Gain electrons

• Gain protons

What is the formula of calcium bromide?

• CaBr

• Ca₂Br

• CaBr₂

• Ca₂Br₂

What is the formula of cobalt (II) nitride

• CoN

• Co₂N

• Co₃N₂

• Co₂N₃

What is the formula of the polyatomic ion hypochlorite?

• ClO^1-

• ClO₂^1-

• ClO₃^1-

• ClO₄^1-

What is the formula of ammonium oxide?

• NH₄O

• NH₄(O)₂

• N₂H₈O

• (NH₄)₂O

What is the name of Fe₂S₃

• Iron (IV) sulfide

• Iron (I) sulfide

• Iron (III) sulfide

• Iron (II) sulfide

What is the formula of hexaselenium nonaboride?

• Se₆B₅

• Se₆B₉

• Se₉B₆

• Se₆B₈

What is the correct name for this covalent molecule:

• Dicarbon monoxide pentahydride mononitride

• Pentacarbon monoxide trihydride mononitride

• Carbon dioxide pentahydride septanitride

• Dicarbon monoxide heptahydride hexanitride

Which is the correct Lewis dot diagram for a single atom of phosphorus:

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How many covalent bonds can group 14 elements make?

• 1

• 2

• 3

• 4