Points to remember

1. Fundamental concept of chemistry

The matter is anything that has mass and volume (takes up place)

1.1. State of matter

Matter comes in different forms called states of matter

The three states of matter are: solid, liquid and gas

Each state of matter has its own characteristics, such as:

- The solid state keeps a constant shape and volume, cannot be compressed and cannot drain.

- The liquid state takes the shape of the container, keeps the volume constant, cannot be compressed, can flow

- The gaseous state takes the shape and volume of the container, can be compressed and can flow

1.2. Properties of matter

• Physical properties: a characteristic that can be observed or measured without changing the nature of matter.

• Chemical properties: Any property that describes how a material reacts with another material, forming a new

material.

1.3. Change of state of matter

• When a solid becomes liquid, it is called fusion

• When a liquid becomes solid, it is called solidification

• When a liquid becomes gas, it is called vaporization

• When a gas becomes liquid, it is called liquefaction

• When a gas becomes solid, it is called condensation

• When a solid becomes gas, it is called sublimation