Structure Types
Crystal Types:
• Ionic
• Metallic
• Molecular
• Macromolecular
Molecular Crystals:
• Low Melting/Boiling Points
Little energy is required to overcome weak intermolecular forces
• Don’t conduct electricity
Doesn’t contain delocalised electrons or ions that are free to move and carry
electrical charge
• Soft
Little energy is required to overcome the weak intermolecular forces, so molecules
can move easily
Ice: Hydrogen Bond
Solids are usually denser than liquids, however
ice is an exception.
Intermolecular forces hold the molecules in a
lattice structure. This pushes the molecules apart
and causes the ice to be less dense than liquid
water.
Crystal Types:
• Ionic
• Metallic
• Molecular
• Macromolecular
Molecular Crystals:
• Low Melting/Boiling Points
Little energy is required to overcome weak intermolecular forces
• Don’t conduct electricity
Doesn’t contain delocalised electrons or ions that are free to move and carry
electrical charge
• Soft
Little energy is required to overcome the weak intermolecular forces, so molecules
can move easily
Ice: Hydrogen Bond
Solids are usually denser than liquids, however
ice is an exception.
Intermolecular forces hold the molecules in a
lattice structure. This pushes the molecules apart
and causes the ice to be less dense than liquid
water.
