Ionic Compounds; Names and Formulas

What comes first in the name and the formula of an ionic compound?

• the cation

• the anion

Roman numerals are needed in the compound name _____________.

• always

• only when the cation has more than one possible charge.

• to match the subscript of the metal

• for all metals

If a Roman numeral is written after the metal in the name of an ionic compound, ________________.

• it is the charge on the cation.

• it is the subscript for the metal in the formula.

• it will give the subscript for the anion in the formula.

• it tells how many isotopes exist for the metal.

What is the correct formula for the ionic compound containing sodium and oxygen?

• NaO

• Na₂O

• NaO₂

• SO₂

Tags

NGSS.MS-PS1-1

What is the correct formula for the ionic compound containing magnesium and oxygen?

• MgO

• Mg₂O

• MgO₂

• Mg₂O₂

Tags

NGSS.MS-PS1-1

What is the correct formula for the ionic compound containing aluminum and bromine?

• AlBr

• AlBr₂

• AlBr₃

• AlBr₄

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the correct formula for the ionic compound containing iron(III) ions and nitrogen ions?

• FeN

• Fe₃N

• FeN₃

• Fe₃N₃

Tags

NGSS.HS-PS1-2

What is the correct formula for the ionic compound containing aluminum and sulfur ions?

• AlS

• Al₃S₂

• Al₂S₃

• Al₃S₃

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What's the correct name for this ionic compound, K₂S?

• potassium(I) sulfide

• potassium sulfide

• potassium(II) sulfide

• dipotassium sulfide

What's the correct name for this ionic compound, CaCl₂?

• calcium dichloride

• calcium chloride

• calcium(II) chloride

• calcium chloride(II)