Writing Formulas for Ionic Compounds 1

What is the formula for the compound formed by magnesium ions and nitrogen ions?

• MgN
• Mg₂N₃
• Mg₃N₂
• MgN₃

What is the formula for aluminum fluoride?

• AlF
• Al₂F₃
• AlF₃
• Al₃F₂

When using the criss-cross rule...

• charges become subscripts for the same ion
• subscripts become charges for the same ion
• charges become subscripts for opposite ions
• subscripts become charges for opposite ions

The chemical formula of silver sulphide is

• AgS
• Ag₂S
• Au₂S
• Ag₂SO₄

The chemical formula of magnesium hydroxide is

• MgOH₂
• Mg(OH)₂
• Mg(OH)
• MgH₂

Tags

NGSS.MS-PS1-1

The chemical formula of ammonium carbonate is

• NH₃CO₃
• NHCO
• NH₄CO₃
• (NH₄)₂CO₃

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 sodium nitrate?

• Na₃NO
• NaNO
• Na₃NO₃
• NaNO₃

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

• KO.
• K₂O.
• K₂O₂.
• KO₂.

Which of these combinations is an ionic compound made of?

• Metal and Metal
• Nonmetal and Nonmetal
• Metal and Nonmetal
• Cation and Cation