Ionic Compounds Quiz

What is the chemical formula for sodium chloride?

• NaCl

• C₆H₁₂O₆

• CO₂

• H₂O

Answer explanation

The chemical formula for sodium chloride is NaCl. It is composed of one sodium atom (Na) and one chlorine atom (Cl), forming a stable ionic compound.

What is the chemical formula for aluminum sulfide?

• AlS₂

• AlS₃

• Al₂S₃

• Al₃S₂

Answer explanation

The chemical formula for aluminum sulfide is Al2S3. It consists of two aluminum atoms (Al) and three sulfur atoms (S).

What is the chemical formula for calcium nitride?

• CaNO₃

• Ca₂N

• Ca₃N₂

• CaN₂

Answer explanation

The chemical formula for calcium nitride is Ca3N2. It consists of three calcium atoms (Ca) and two nitrogen atoms (N), making it the correct choice.

What is the charge of the sodium ion in sodium chloride?

• 0

• -1

• +2

• +1

Answer explanation

The charge of the sodium ion in sodium chloride is +1. Sodium loses one electron to form a positive ion.

What is the charge of the chloride ion in sodium chloride?

• +1

• -2

• -1

• 0

Answer explanation

The chloride ion in sodium chloride has a charge of -1, which is the correct choice.

What is the charge of the magnesium ion in magnesium oxide?

• 3+

• 2+

• 4+

• 1+

Answer explanation

The charge of the magnesium ion in magnesium oxide is 2+. This is because magnesium has a tendency to lose two electrons, resulting in a 2+ charge.

What is the charge of the oxide ion in magnesium oxide?

• +1

• -1

• +2

• -2

Answer explanation

The charge of the oxide ion in magnesium oxide is -2. This is because magnesium has a charge of +2 and the compound is neutral, so the oxide ion must have a charge of -2 to balance it out.

What is the charge of the aluminum ion in aluminum sulfide?

• 2+

• 3+

• 4+

• 1+

Answer explanation

The charge of the aluminum ion in aluminum sulfide is 3+. This is because aluminum sulfide is an ionic compound, and the overall charge of the compound must be neutral. Since sulfide has a charge of 2-, the aluminum ion must have a charge of 3+ to balance the charges and create a neutral compound.

What is the charge of the sulfide ion in aluminum sulfide?

• -2

• +1

• +2

• -3

Answer explanation

The charge of the sulfide ion in aluminum sulfide is -2. This is because aluminum has a charge of +3 and the compound is neutral, so the sulfide ion must have a charge of -2 to balance it out.

What is the name of the ionic compound FeCl₃ using Roman numerals?

• Iron(III) chloride

• Iron(III) bromide

• Iron(IV) chloride

• Iron(II) chloride

Answer explanation

The correct name of the ionic compound FeCl3 using Roman numerals is Iron(III) chloride. It indicates that the iron ion has a +3 charge.