Unit 2: Chapter 2 - Structure And Properties

Question 1

Simple Molecules

Melting and boiling point?

Conduct electricity?

Intermolecular forces?

Answer 1

They have LOW MELTING and BOILING POINTS. Simple molecules are often at liquid or gas state at room temp. Some are solids with low melting points e.g. Iodine and sulfur.

INTERMOLECULAR FORCE

Between covalent bonds, there is an intermolecular force between atoms with molecules. The intermolecular forces between molecules are small however.

Simple molecules will not conduct electricity as it has no overall charge. This makes it impossible to conduct electricity.

Question 2

Giant Covalent Structures

Answer 2

High melting and boiling points and are insoluble in water.

Question 3

Giant Ionic Structures

Boiling and melting points?

When it’s melted?

Dissolve?

Answer 3

It takes a lot of energy to break up a giant ionic lattice. This mean HIGH MELTING POINTS and HIGH BOILING POINTS.

When this lattice is melted, ions are free to move around and can carry their electrical charge.

Many ionic compound dissolve in water. Ions are free to move around.