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
Agatha (given name) In 1924–1930, the name was included into various Soviet calendars, which included the new and often artificially created names promoting the new Soviet realities and encouraging the break with the tradition of using the names in the Synodal Menologia. Its diminutives include Agatka (), Aga (), and Gata (). Agatha (given name) Agatha also Agata, is a feminine given name derived from the Ancient Greek word ἀγαθός ("agathos"), meaning "good". It was the name of St. Agatha of Sicily, a third-century Christian martyr. The name has been rarely used in English-speaking countries in recent years. It was last ranked among