Concept:Glass is a solid with a disordered atomic structure, not a regular crystalline arrangement.
Explanation:Solids are grouped by how their atoms are arranged.
Crystalline solids have atoms in a repeating pattern, like salt (
NaCl) or diamond.
Amorphous solids have atoms packed randomly, with no long‑range order.
Glass is made by cooling a liquid quickly so atoms cannot form crystals.
This gives glass a disordered, glassy structure.
It is not a liquid because it does not flow under normal conditions.
It is not a colloid, since colloids are mixtures of two phases (e.g., milk), while glass is a single‑phase solid.
Thus, glass is best described as a non‑crystalline amorphous solid.
Answer:Non‑crystalline amorphous solid