Why is the solid state of matter usually the most dense?

Answer 1

The solid state of matter is typically the most dense because the particles (atoms, molecules, or ions) are closely packed together in a fixed arrangement, minimizing the space between them. This close packing allows for stronger intermolecular or ionic forces to act, leading to a higher mass per unit volume. In contrast, liquids and gases have more significant spaces between particles, resulting in lower densities.