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: orbital properties. Barium atoms have 56 electrons and the shell structure is 2.8.18.18.8.2. The ground state electronic configuration of neutral Barium is [ Xe ]. 6s 2 and the term symbol of Barium is 1 S 0. 1  Pauling electronegativity: 0.89 (Pauling units). 2  First ionisation energy: 502.9 kJ mol â1. 3  Second ionisation energy: 965.2 kJ mol â1.