David Werner M.D. is a male health care provider in State College, PA with Ophthalmologist listed as his primary specialization. His credentials are: M.D.. He graduated from University Of Vermont College Of Medicine in 1973 (around 45 years of experience). He lists the following medical group affiliations: Werner Eye Associates, P.c. His office phone number, address, ratings, services provided, comparisons, and specializations can be viewed below.
A molecule is formed when atoms join together by chemical bonds. There are over a hundred different types of atom, called elements. The atoms of a particular element are identical to each other.
A chemical substance is a form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be chemical elements, chemical compounds, ions or alloys. chemical compound can be either atoms bonded together in molecules or crystals in which atoms, molecules or ions form a crystalline lattice. Compounds based primarily on carbon and hydrogen atoms are called organic compounds, and all others are called inorganic compounds.