Homework-Names and Formulas for Ionic Compounds

What is the term for the chemical formula for an ionic compound, which represents the simplest ratio of the ions involved?

• a formula unit

• an ionic unit

• a lattice formula

• a ratio formula

What term identifies a one-atom ion, such as Mg²⁺ or Br^–?

• single ion

• elemental ion

• monatomic ion

• simple ion

Which group of elements commonly forms ions that have a charge of 2+?

• F, Cl, Br, I

• Be, Mg, Ca, Sr, Ba

• H, Li, Na, K, Rb, Cs

• O, S, Se, Te

Which statements about formula units and the composition of ionic compounds are true?

• The formula unit represents the simplest ratio of the ions in an ionic compound.

• The overall charge of a formula unit is zero.

• The chemical formula for an ionic compound represents a formula unit.

• An ionic compound is made up of molecules called formula units.

• A formula unit may have a positive, negative, or neutral charge depending on the ions involved.

Which formula is correct for the binary ionic compound made of the given elements?

• magnesium and sulfur, MgS

• calcium and bromine, CaBr₂

• sodium and fluorine, NaF

• beryllium and fluorine, Be₂F

• potassium and oxygen, KO₂

Ions made up of more than one atom are called (a)   ions

Most transition metals and group 13 and 14 metals have ______.

• one common ion with a charge of 2+

• one common ion with a charge of 3+

• more than one possible ionic charge

• one common ion with a charge of 1+

Which is the formula for sodium sulfate?

• Na₂SO₃

• Na₂SO₄

• Na(SO₄)₂

• NaSO₃

What are ions made up of more than one atom called?

• multivalent ions

• complicated ions

• monatomic ions

• polyatomic ions

Which name–formula pairs are correct?

• ammonium sulfate, (NH₄)₂SO₄

• magnesium carbonate, MgCO₃

• calcium sulfate, Ca₂(SO₄)₂

• calcium phosphate, Ca₃(PO₄)₂

• sodium chlorite, NaClO