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.
Barium is an element in Group 2, so it has two valence electrons, and that it's charge is 2+. Hydroxide is a polyatomic negative ion with a valency of 1, and that it's charge is 1-. As barium is a metal while hydroxide is a non-metal, they combine to form an ionic compound. To form a neutral compound, balance the positive and negative charges by applying LCM,and the number of positive and negative charges must be equal. Ba^(2+) and (OH)^(2-) Ba^(2+) (OH)^(2-) (OH)^(2-) As seen from above, one barium ion and two hydroxide ions form barium hydroxide.