Ionic Compounds and Formulas

When adding a subscript to a polyatomic ion, you should...

• multiply any subscripts on the polyatomic ion by the subscript you are adding

• put parentheses around the polyatomic ion before adding a subscript

• write the new subscript next to any subscripts on the polyatomic ion

• put the polyatomic ion in square brackets before adding the subscript

What is the formula for manganese(III) oxide?

• MgO

• Mg₂O₃

• MnO

• Mn₂O₃

Tags

NGSS.HS-PS1-2

The chemical formula for an ionic compound of potassium and oxygen is

• KO.

• K₂O.

• K₂O₂.

• KO₂.

Tags

NGSS.HS-PS1-2

The formula of this atom when it becomes an ion would be

• N^-2

• N⁺³

• N^-3

• N⁺²

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

When naming ionic compounds, the cation is always named first and the anion is always named second.

• False

• True

An atom that has lost or gained electrons; an atom with a charge.

• cation

• anion

• isotope

• ion

Conducts electricity well when melted or dissolved

• Ionic compounds

• Covalent compounds

Select the correct formula for the

IONIC COMPOUND

Magnesium Chloride

• MgCl₂

• MgCl

• Mg₂Cl

• Mg₂Cl₃

Select the correct formula for the

IONIC COMPOUND

Boron Chloride

• BCl₂

• BCl

• B₃Cl

• BCl₃

Select the correct formula for the

IONIC COMPOUND

Aluminum Oxide

• AlO

• Al₃O₂

• AlO₂

• Al₂O₃