NCEA Ionic formulae

The formula for sodium oxide is

• NaO

• Na₂O

• Na2O

• NaO₂

The formula for calcium oxide is

• CaO

• Ca₂O₂

• CaO₂

• Ca(O)

The formula for lead hydroxide is

• PbO

• PbOH

• Pb(OH)₂

• PbOH₂

The formula for aluminium hydroxide is

• AlOH

• Al(OH)₂

• Al(OH)₃

• Al₃OH

The formula for iron(II) oxide

• Fe₂O

• 2FeO

• Fe₂(OH)

• FeO

The formula for copper chloride is

• ClCu₂

• CuCl

• CuCl₂

• CuCl²

The formula for ammonium sulfate is

• (NH₄)₂S

• NHSO₄

• NH₄₂SO₄

• (NH₄)₂SO₄

Tags

NGSS.HS-PS1-1

The formula for iron(III) chloride is

• FeCl

• FeCl₃

• FeCl₂

• Fe₃Cl₃

The formula for potassium chloride is

• KCl

• NaCl

• K₂O

• K₂CO₃

Tags

NGSS.MS-PS1-1

The formula for potassium hydrogencarbonate is

• KCl

• KHCO₃

• K₂O

• K₂CO₃