Simple Molecular structure

• A simple molecular structure contains small molecules.
• Simple molecular structure are formed from only a few atoms.
• They have strong covalent bonds between the atoms with in a molecule, what have weak bonds between molecules is called as Vanderwaal’s force.
• These vanderwaal’s forces increase steadily with the increasing size of the molecules.
• Most of the simple molecular structures are liquids or gases under normal conditions.
• In simple molecular structures the forces between the molecules in the solid and liquid state are weak such that very little energy is needed to break up the structure.
E.g.: - Methane (CH4), Iodine (I2), Water (H2O), Carbon dioxide (CO2)

Structure of Methane
This is the tetrahedral shake of methane molecule. The carbon-hydrogen bond is a strong covalent bond. There is weak vanderwaal’s force is between the molecules of methane.

Structure of Iodine
Iodine has a crystal structure in which iodine molecules are packed together. The force between the molecules are weak so iodine is a flaky solid that sublimes if heated gently iodine crystals can be crushed easily.