Collection Screen Savers Win Wallpaper Mac Wallpaper Movie Gallery Chemical Crystals Chemical compounds can exist in three basic phases, gaseous, liquid, or solid. Gases consist of weakly bonded atoms and expand to fill any available space. Solids are characterized by strong atomic bonding and have a rigid shape. Most are crystalline, having a three-dimensional periodic atomic arrangement. Some, such as glass, lack this periodic arrangement and are noncrystalline, or amorphous.
Liquids have characteristics that fall in between gases and solids.
This cinemicrographic collection shows time-lapse movies of various chemical compounds as they change physical states. Your web browser must have RealPlayer software installed in order to view these digital video sequences. Acetylcholine - Acetylcholine is a neurotransmitter that is responsible for gated binding control of cation channels to allow inflow of sodium into muscle cells. It is also used to test water for the presence of phosphates. The drug crystallizes in the form of a white, needle-like powder with only a faint odor.