1. EXTRA

Question 1

Properties of ionic compounds

Answer 1

Ionic compounds:

• regular structures
• giant ionic lattice - strong electrostatic forces
• they have high melting points
• they have high boiling points

Question 2

Properties of SIMPLE COVALENT MOLECULES

Answer 2

Properties of SIMPLE COVALENT MOLECULES

• only contain a few ATOMS held together by COVALENT BONDS
• EG carbon dioxide - CO2 - contains 1 atom of Carbon and 2 atoms of Oxygen
• LOW melting and LOW boiling points - because little energy is needed to break the weak intermolecular forces
• EG of SIMPLE MOLECULES - H Y D R O G E N - P U R E W A T E R - M E T H A N E - A M M O N I A (its the weak intermolecular forces that break when one is melted or boiled NOT the STRONG COVALENT BONDS)

Question 3

Molton means ….

Answer 3

Molton means … M E L T E D