The characteristics of particles of matter can be categorized into three main points:

1. Particles are in constant motion:
Particles of matter are always in motion. They continuously move in random directions and collide with one another. The motion of particles depends on the temperature of the substance. As the temperature increases, the motion of particles also increases.

2. Particles have space between them:
Particles of matter are not packed tightly together. There is space between them. The amount of space between particles depends on the state of matter. In solids, particles are closely packed together, while in gases, particles are widely spaced.

3. Particles have attractive forces:
Particles of matter have attractive forces that hold them together. These forces are strongest in solids and weakest in gases. The strength of the attractive forces is determined by the type of particles and the distance between them.

In summary, particles of matter are in constant motion, have space between them, and have attractive forces that hold them together. Understanding these characteristics helps to explain the properties of different states of matter and how they behave under different conditions.