Matter

Matter

• has different properties including its particulate nature, physical and chemical properties, and extensive and intensive properties.

• anything that occupies space and has mass.

Particular Nature of Matter

• all matter is made up of atoms, which move in an empty space called void.

States of Matter

• Solids

• have definite shape and volume

• tightly packed together

• almost incompressible

• particles vibrate in a fixed position

• high densities and can expand only slightly when heated.

• Liquids

• no definite shape but have definite volume

• particles are in contact with each other

• have enough energy to keep changing positions relative to one another

• forces between particles are strong enough to keep them close together but not strong enough to prevent them from moving apart from each other

• generally have medium densities

• Gas

• takes shape, no definite volume

• can expand to fill any volume

• particles have enough energy to move freely

• particles collide randomly