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
Aurora (given name) Aurora (given name) Aurora is a feminine given name, originating from the name of the ancient Roman goddess of dawn Aurora. The variant used in the Russian language is "" ("Avrora"). While in use before the 20th century, it became more common after the Russian Revolution of 1917, due to the role cruiser "Aurora" played in the events. 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. Diminutives of this