Brief recap

Lead Chloride is an ionic compound, made up from Pb²⁺ ions and Cl^- ions. Which is the correct formula for this compound?

• PbCl₃

• PbCl

• PbCl₄

• PbCl₂

Ionic compounds conduct electricity when dissolved in water. Which statement below best explains the property?

• Ions are free to move.

• Electrons are free to move.

• Bonds are strong.

• There are weak intermolecular forces of attraction.

Mg²⁺ and Cl^- create...

• Mg₂Cl
• MgCl₂
• Mg₂Cl₂
• MgCl

Ca²⁺ and N^3- create...

• Ca₂N₃
• Ca₃N₂
• CaN₃
• Ca₂N
  

The chemical formula of Iron (III) and bromine is

• FeBr

• Fe(III)Br

• FeBr₃

• Fe₂Br₃

Ca ⁺²  and  OH ^-

• Ca₂OH
• CaOH₂
• Ca(OH)₂
• correct answer is not given

What is the formula of Sodium oxide?

• Na2O
• NaO₂
• Na₂O₂
• Na₂O

What is the formula of calcium oxide?

• CaO₂
• CaO
• Ca₂O
• CO

What happens to valence electrons in ionic bonding?

• The metal loses valence electrons to the nonmetal

• The metal and nonmetal share electrons equally

• The nonmetal loses valence electrons to the metal

• Both the metal and nonmetal lose electrons

A charged particle that has gained or lost electrons is called a _____.

• molecule
• ion
• isotope
• element