Writing Ionic Compounds Chemical Formulas

What is the correct formula for the compound, lithium oxide?

• LiO
• Li₂O
• LiO₂
• Li₂O₂

What is the formula for manganese(III) oxide?

• MgO

• Mg₂O₃

• MnO

• Mn₂O₃

From the following ionic compounds, choose the name-formula pair that is not correctly matched.

• sodium sulfide  Na₂S

• ammonium nitrate  NH₄NO₃

• sodium sulfate  Na₂SO₃

• calcium oxide  CaO

Name the following ionic compound: MgSO₄

• magnesium sulfoxide

• magnesium sulfide

• magnesium sulfate

• magnesium oxide

Name the following ionic compound: Cr(NO₂)₃

• chromium nitrite

• chromium nitride

• chromium III nitride

• chromium III nitrite

The formula of calcium phosphate is 

• CaPO₄

• Ca₂(PO₄)₃

• Ca₃PO₄

• Ca₃(PO₄)₂

The chemical compound for sodium phosphate would be:

• NaPO₄

• Na₂PO₄

• Na₃PO₄

• Na(PO₄)₃

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

How do the following two elements bond together?
K¹⁺  S^2- 

• KS

• K₈S

• K₆S₃

• K₂S

Tags

NGSS.HS-PS1-2

What is the correct formula for aluminum phosphide?

• Al₃P₃

• AlP

• AlPO₄

• AlPO₃