Here are 5 properties of matter, categorized into two groups:

Physical Properties:

1. Mass: The amount of matter in an object. It's a fundamental property and is measured in kilograms (kg).

2. Volume: The amount of space an object occupies. It's measured in cubic meters (m³) or liters (L).

Chemical Properties:

3. Flammability: The ability of a substance to burn or ignite easily.

4. Reactivity: How readily a substance undergoes a chemical reaction with other substances.

5. pH: A measure of the acidity or basicity of a substance.

Bonus:

Here's an additional property:

* Density: The mass of a substance per unit volume. This property is a combination of both mass and volume.

These are just a few of the many properties that can be used to describe matter.