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Barium is a chemical element; it has symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal . Because of its high chemical reactivity , barium is never found in nature as a free element.
Barium azide can be used to make azides of magnesium, sodium, potassium, lithium, rubidium and zinc with their respective sulfates. [4]Ba(N 3) 2 + Li 2 SO 4 → 2 LiN 3 + BaSO 4. It can also be used as a source for high purity nitrogen by heating:
The Natural Sciences Tripos (NST) is the framework within which most of the science at the University of Cambridge is taught. The tripos includes a wide range of Natural Sciences from physics, astronomy, and geoscience, to chemistry and biology, which are taught alongside the history and philosophy of science.
A Bachelor of Arts (abbreviated B.A., BA, A.B. or AB; from the Latin baccalaureus artium, baccalaureus in artibus, or artium baccalaureus) is the holder of a bachelor's degree awarded for an undergraduate program in the liberal arts, [1] or, in some cases, other disciplines. A Bachelor of Arts degree course is generally completed in three or ...
Bachelor's degrees in Algerian universities are called "الليسانس" in Arabic or la licence in French; the degree normally takes three years to complete and is a part of the LMD ("licence", "master", "doctorat") reform, students can enroll in a bachelor's degree program in different fields of study after having obtained their baccalauréat (the national secondary education test).
The hashemite crystals are not composed of pure barium chromate but instead contain some small sulfur content as well. The different crystals contain a range of sulfur impurities ranging from the more pure dark crystals, Ba 1.00 (Cr 0.93, S 0.07) 1.00 O 4, to the less pure light crystals, Ba 1.00 (Cr 0.64, S 0.36) 1.00 O 4. [3]
Almost all undergraduate bachelor's degrees at Oxford are titled Bachelor of Arts (BA), apart from the Bachelor of Theology (BTh) and Bachelor of Fine Arts (BFA). At the same time, the university offers two bachelor's degrees as postgraduate courses – the Bachelor of Civil Law (equivalent to a Master of Laws ) and the Bachelor of Philosophy ...
Barium sulfide is the inorganic compound with the formula Ba S. BaS is the barium compound produced on the largest scale. [3] It is an important precursor to other barium compounds including BaCO 3 and the pigment lithopone, ZnS/BaSO 4. [4] Like other chalcogenides of the alkaline earth metals, BaS is a short wavelength emitter for electronic ...