Naming and Writing Formula of Ionic Compounds

Which of these combinations of elements is an ionic compound made up of?

• metal and nonmetal

• metal and metal

• nonmetal and nonmetal

• metal and metalloid

Answer explanation

Ionic compounds are always made up of METAL element and NONMETAL element.

When naming ionic compounds with transition metals, you need to include roman numerals to show the ________ of the metal.

• atomic number

• ionic charge

• mass number

Answer explanation

Ionic charge is what represents the Roman Numeral.

example.

Fe+2 --> iron (II)

Cu+1 --> copper (I)

The chemical formula NaBr is called

• sodium bromine

• sodium bromide

• sodium bromite

• bromine sodium

Answer explanation

In naming an ionic compound, name the metal element first and name the nonmetal element in the "ide" form.

metal --> Sodium

nonmetal in "ide" --> Bromide

The chemical formula BeCl₂ is called

• Beryllium Chloride

• Beryllium Chlorine

• Beryllium (II) Chloride

Answer explanation

In naming an ionic compound, name the metal element first and name the nonmetal element in the "ide" form.

metal --> Beryllium

nonmetal in "ide" --> Chloride

The chemical formula CaO is called

• calcium oxide

• calcium oxygen

• calcium (II) oxide

Answer explanation

In naming an ionic compound, name the metal element first and name the nonmetal element in the "ide" form.

metal --> Calcium

nonmetal in "ide" --> Oxide

The chemical formula FeO is called

• Iron (II) Oxide

• Iron Oxide

• Iron Oxygen

Answer explanation

In naming an ionic compound WITH TRANSITION METALS, name the transition metal element first with the ROMAN NUMERAL and name the nonmetal element in the "ide" form.

metal --> Iron (II)

nonmetal in "ide" --> Oxide

Hint: The ionic charge of O is -2,

Iron has two possible charges, (+2 or +3). +2 was used to balance out the -2 of oxygen.

The chemical formula Cu₂O is called

• Copper (I) Oxide

• Copper Oxide

• Copper Oxygen

Answer explanation

Copper is a transition metal.

In naming an ionic compound WITH TRANSITION METALS, name the transition metal element first with the ROMAN NUMERAL and name the nonmetal element in the "ide" form.

metal --> Copper (I)

nonmetal in "ide" --> Oxide

Hint: The ionic charge of O is -2,

Copper has two possible charges, (+1 or +1). +1 was used for the two copper atoms to balance out the -2 of oxygen.

The chemical formula NiCl₂

• Nickel (II) Chloride

• Nickel Chlorine

• Nickel Chloride

Answer explanation

Nickel is a transition metal. In naming an ionic compound WITH TRANSITION METALS, name the transition metal element first with the ROMAN NUMERAL and name the nonmetal element in the "ide" form.

metal --> Nickel (II)

nonmetal in "ide" --> Chloride

Hint: The ionic charge of Cl is -1,

Nickel has two possible charges, (+2 or +3). +2 was used to balance out the 2 chloride ions.

The chemical formul Co₃N₂ is called

• cobalt (II) nitride

• cobalt nitride

• cobalt nitrogen

Answer explanation

Cobalt is a transition metal. In naming an ionic compound WITH TRANSITION METALS, name the transition metal element first with the ROMAN NUMERAL and name the nonmetal element in the "ide" form.

metal --> Cobalt (II)

nonmetal in "ide" --> Nitride

Hint: The ionic charge of N is -3,

Cobalt +2 was used and multiplied by its subscript (+6). This is to balance the -3 charge that each of the two Nitrogen atoms have (-6).

The chemical fomula AgCl is called

• Silver Chloride

• Silver (I) Chloride

• Silver Chlorine

Answer explanation

Although Silver is a transition metal, DO NOT use ROMAN NUMERALS because it only has one kind of ionic charge (+1).

metal --> Silver

nonmetal in "ide" --> Chloride

Ag +1 and Cl is -1, and so they balance out.