HomeLink Parent Portal is available for all MDUSD students and legal guardians. There are a variety of reasons to have a HomeLink Parent Portal account, and some of the benefits include the ability to check student grades (Middle & High Schools only), test scores, attendance, as well as other contact and registration features. 2.
When present in compounds barium exists usually in the Ba 2+ , divalent state. Barium dissolves in most aqueous acids except sulfuric acid, due to the formation of an insoluble protective layer of barium sulfate.
Elemental barium is a silver-white metal which comprises approximately 0.05% of the earth's crust. In nature, it combines with other chemicals such as sulfur or carbon and oxygen. Some barium salts are freely soluble in water, whereas others are practically insoluble (e.g., barium sulfate and barium carbonate).Barium compounds are used by the oil and gas industries to make drilling muds.n nature, it combines with other chemicals such as sulfur or carbon and oxygen. Some barium salts are freely soluble in water, whereas others are practically insoluble (e.g., barium sulfate and barium carbonate). Barium compounds are used by the oil and gas industries to make drilling muds.