Comparison

• Existence

  • Ionic Bond ➔ exist in the solid state only
  • Covalent Bond ➔ Exist as solids, liquids and gasses
• Occurs between

  • Ionic - nonmetal and metal
  • Covalent - between two nonmetals
• Conductivity

  • Ionic - low
  • Covalent - very low
• Hardness

  • Ionic - hard because of crystalline nature
  • Covalent - not very hard though silicon diamond and carbon
• Melting and boiling points

  • ionic - high
  • covalent - Low
• Volatility

  • Ionic - Low
  • Covalent - High