- Chemistry is the scientific study of the properties and behavior of matter. It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances. Chemistry also addresses the nature of chemical bonds in chemical compounds.
- Beid (stars.astro.illinois.edu)
BEID (Omicron-1 Eridani). In the middle of the first southerly turning of Eridanus (the River) lie a seeming pair of fourth magnitude stars, Beid and Keid, which Bayer placed far down in the Greek alphabet as Omicron-1 and Omicron-2.