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
Dora (given name) Dora (given name) Dora () is a female name of Greek origin being a shortened form or derived from Dorothea (Dorothy), Theodora meaning "Gift" or in its full form "God's Gift", from , "doron", "gift" + , "theos", "god". The name "Dora" can also be a short form of "Isadora", "Isidora" and other such compound names. The earliest form of the word "doron" is the Mycenaean Greek , "do-ra", meaning "gifts", written in the Linear B syllabic script, but it is not an anthroponym, it is only the plural () of said word; on the other hand, the names "Theodora"