Naming Ionic Compounds

Front

What is the name of the compound MgO?

Back

magnesium oxide

Answer explanation

The compound MgO is named magnesium oxide. It consists of magnesium (Mg) and oxygen (O) ions. The other options, MgCO3, MgCl, and MgSO4, represent different compounds and are not correct.

Front

What is the name of the compound Al₂S₃?

Back

aluminum sulfide

Answer explanation

The compound Al2S3 consists of aluminum (Al) and sulfur (S). Its name is derived from the elements it contains, making it aluminum sulfide. The other options do not match the chemical formula.

Front

Name the following ionic compound: BeCl₂

Back

beryllium chloride

Answer explanation

The compound BeCl2 is named beryllium chloride. The prefix 'di-' is not used in ionic compounds, and the oxidation state of beryllium is +2, but the standard name is simply beryllium chloride.

Front

Name the following ionic compound: Cs₂S

Back

cesium sulfide

Answer explanation

The compound Cs₂S consists of cesium (Cs) and sulfide (S^2-). The correct name is cesium sulfide, as it reflects the ions present without indicating oxidation states, which are not needed here.

Front

When naming a compound, which of these is written first? Metal, Nonmetal, Anion, Cation

Back

Cation

Answer explanation

In naming compounds, the cation (positive ion) is written first, followed by the anion (negative ion). Therefore, the correct answer is 'Cation'.

Front

What is the name of the compound Sc(OH)₃?

Back

Scandium (III) hydroxide

Answer explanation

The compound Sc(OH)3 contains scandium with a +3 oxidation state, indicated by the (III) in the name. Therefore, the correct name is Scandium (III) hydroxide.

Front

What is the formula for manganese(III) oxide (Mn and O)?

Back

Mn₂O₃

Answer explanation

Manganese(III) oxide has manganese in the +3 oxidation state. To balance the charge, two manganese (Mn) atoms combine with three oxygen (O) atoms, resulting in the formula Mn2O3.

Front

What is the formula for a compound made up of silicon and oxygen?

Back

SiO₂

Answer explanation

The correct formula for a compound made of silicon and oxygen is SiO₂, known as silica. This indicates that each silicon atom is bonded to two oxygen atoms, which is the most common and stable form of silicon oxide.

Front

What is the proper chemical formula for combining Al³⁺ and Cl^-?

Back

AlCl₃

Answer explanation

Aluminum (Al) has a +3 charge and chlorine (Cl) has a -1 charge. To balance the charges, three Cl ions are needed for each Al ion, resulting in the formula AlCl3. Thus, the correct answer is AlCl₃.

Front

What is the name of the following compound: K₂SO₄?

Back

Potassium sulfate

Answer explanation

The compound K2SO4 consists of two potassium (K) ions and one sulfate (SO4) ion. Therefore, its correct name is potassium sulfate, which reflects the presence of potassium and the sulfate group.