Hydrogen compounds are only required to contain carbon. However, most of them also contain hydrogen, and because it is the carbon-hydrogen bond which gives this class of compounds most of its particular chemical characteristics, carbon-hydrogen bonds are required in some definitions of the word "organic" in chemistry. Millions of hydrocarbons are known, and they are usually formed by complicated synthetic pathways that seldom involve elementary hydrogen. Compounds of hydrogen are often called hydrides, a term that is used fairly loosely. The term "hydride" suggests that the H atom has acquired a negative or anionic character, denoted H, and is used when
Alma (given name) Latin origin, appears in various European languages, and has different meanings in each. These varieties do not generally stray from the notion of the wise, nurturing mother, however. In the Hebrew Bible, Almah means maiden - a young girl or a young woman. In the Septuagint, the word is often rendered as parthenos ('virgin'), most famously in Isaiah 7:14, which is quoted in Matthew 1:23 as a prophecy about Jesus being born of the Virgin Mary. Alma (given name) Alma ( ) is an English feminine given name, but has historically been used in the masculine form as well, sometimes