States of Matter - The Solid State

States of Matter:

Solid:

• Constituent particles are very closely packed
• Force of attraction between particles is very strong. 
• Have definite shape and volume.
• Have high density and can not be diffused.
• It is Incompressible.

Examples of solids are common table salt, table sugar, water ice, frozen carbon dioxide (dry ice), glass, rock, most metals, and wood.

When a solid is heated, the atoms or molecules gain kinetic energy. If the temperature becomes sufficiently high, this kinetic energy overcomes the forces that hold the atoms or molecules in place. Then the solid may become a liquid or a gas, or it may react with chemicals in the environment.

Water ice is an example of a solid that becomes liquid when it is heated gradually.

Dry ice sublimates directly into the gaseous phase.

Wood combines with oxygen in the atmosphere, undergoing combustion.

• Solid
• Properties of solid
• Molecular model of solids