Ionic Compounds

Substances held together by ionic bonds are called ionic compounds. Ionic bonds* occur because of the attraction of cations and anions for each other.

Electrons are transferred between the atoms during bond formation

In most ionic crystals, the anion is larger than the cation

• High boiling points
• High melting points
  • Bonds are strong, hard to break
• (s) - solid
• (aq) - aqueous
• Form crystals
• Conduct energy (g) (aq)

The amount of energy given off when an ionic crystal forms from the gaseous ions of its elements is called the lattice energy

• and :
• and :
• and :

Spectator ions appear the same before and after a reaction