Practice for Interim #2

Ionic compounds are made of

• a metal and a non-metal

• 2 non-metals

• 2 metals

Covalent compounds are made of

• a metal and a non-metal

• 2 non-metals

• 2 metals

Metallic compounds are made of

• a metal and a non-metal

• 2 non-metals

• 2 metals

Which of the following would form a cation?

• potassium

• nitrogen

• helium

• phosphorus

Answer explanation

Metals form cations.

Which of the following would form an anion?

• potassium

• calcium

• helium

• phosphorus

Answer explanation

Non-metals form anions.

Which of the following is a binary ionic compound?

• Ca(NO₃)₂

• C₂H₃Br

• AlCl₃

• AuCu

Answer explanation

Binary means 2, so you need a compound with only 2 elements. It's asking for ionic, so you need a compound with 1 metal and 1 non-metal.

Which of the following is a covalent compound?

• Ca(NO₃)₂

• C₂H₃Br

• AlCl₃

• AuCu

Answer explanation

Covalent compounds are made exclusively of non-metals.

Which of the following is a polyatomic ionic compound?

• Ca(NO₃)₂

• C₂H₃Br

• AlCl₃

• AuCu

Answer explanation

Look for a polyatomic ion.

Which elements MUST have a Roman numeral in the name of any compound that contains them?

• alkali metals

• alkaline earth metals

• transition metals

• halogens

• noble gases

Answer explanation

Transition metals. They have variable charges, so the compound name must have Roman numerals in the name to tell you the charge of the transition metal atom.

Hirshfieldium is a metal that can have a charge of either +2 or +5. What is the name of a compound that contains hirshfieldium and nitrogen?

• hirshfieldium nitride

• hirshfieldium (II) nitride

• trihirshfieldium dinitride

• hirshfieldium nitrate

Answer explanation

Hirshfieldium can have 2 different charges, so it must be a transition metal. Compounds with transition metals have to have Roman numerals in the name, to tell you the charge of the metal ion.