Carbon of interconnecting carbon–carbon bonds, a property that is called catenation. Carbon-carbon bonds are strong and stable. Through catenation, carbon forms a countless number of compounds. A tally of unique compounds shows that more contain carbon that those that do not. A similar claim can be made for hydrogen because most organic compounds also contain hydrogen. The simplest form of an organic molecule is the hydrocarbon—a large family of organic molecules that are composed of hydrogen atoms bonded to a chain of carbon atoms. A hydrocarbon backbone can be substituted by other atoms, known as heteroatoms. Common heteroatoms that appear in
Edna (given name) closely related etymologically to the name Eden. Edna (given name) Edna () is a female given name originating from several languages. In Hebrew, it means "pleasure". Various women named Edna are referenced in the Old Testament apocryphal books Jubilees (where the wives of Enoch, Methuselah, and Terah are all so named) and Tobit. The name Edna may also be an Anglicized form of the Irish and Scottish name Eithne, meaning "kernel" in Gaelic. This was a very popular girl's name in the United States in the early 20th century, but has since become unfashionable. It is also a very rare