Ionic bonding

• A positive ion is formed when an electron is lost from an atom
• A negative ion is formed when an atom gains an electron
• Metals in groups 1,2 and 3 have positive ionic charges
• Non metals in groups 5,6 and 7 have negative ionic charges
• Ionic bonding is a strong electrostatic attraction between oppositely charged ions
• Compounds with giant ionic lattices have high melting and boiling points due to the strong electrostatic attraction between oppositely charged ions that need more energy to break
• Ionic compounds don’t conduct electricity when solid, but they do when molten or aqueous