Understanding Ionic Compounds

What is the chemical formula for sodium chloride?

• Na2Cl

• NaCl

• NaClO

• NaCl2

Which ions are present in calcium oxide?

• Calcium ions (Ca^+) and oxygen ions (O^2-)

• Calcium ions (Ca^2+) and oxide ions (O^2-)

• Sodium ions (Na^+) and chloride ions (Cl^-)

• Magnesium ions (Mg^2+) and hydroxide ions (OH^-)

What type of bond is formed in ionic compounds?

• Covalent bonds

• Metallic bonds

• Ionic bonds

• Hydrogen bonds

How do you determine the formula of an ionic compound?

• Combine cations only

• Identify cation and anion, balance charges, write formula.

• Ignore charge balance when writing formula

• Use only anions to write formula

What is the charge of a sulfate ion?

• -2

• +1

• -1

• 0

Name the ionic compound formed from potassium and bromine.

• potassium bromide (KBr)

• potassium sulfate (K2SO4)

• bromine oxide (BrO)

• potassium chloride (KCl)

What is the chemical formula for magnesium chloride?

• MgCl

• Mg2Cl

• MgCl3

• MgCl2

What is the significance of the criss-cross method in writing formulae?

• It calculates the molecular weight of a compound.

• It identifies the physical state of the compound at room temperature.

• It determines the color of the compound when dissolved.

• It ensures the correct ratio of ions in a compound for a neutral formula.

Identify the ionic compound formed from aluminum and oxygen.

• Al2O3

• Al2O4

• Al3O2

• AlO3

What is the charge of a nitrate ion?

• 0

• -2

• -1

• +1