1. Volatile barium compounds burn with a green to pale green flame, which is an efficient test to detect a barium compound. Because of its high chemical reactivity, barium is never found in nature as a free element. Bachelor of Arts. Smoking in the working area is typically forbidden. A stock valuation and forecasting report include rating, fair value assessment, return forecasts, market ratio-based valuations and comparable analysis. [7]:5 Baryte production has risen since the second half of the 1990s from 5.6 million tonnes in 1996 to 7.6 in 2005 and 7.8 in 2011. In this process barium oxide reacts at 500–600 °C (932–1,112 °F) with air to form barium peroxide, which decomposes above 700 °C (1,292 °F) by releasing oxygen:[19][20], Barium sulfate was first applied as a radiocontrast agent in X-ray imaging of the digestive system in 1908. [10] Barium combines with several metals, including aluminium, zinc, lead, and tin, forming intermetallic phases and alloys.[11]. Looking for online definition of BA or what BA stands for?

For subscribers only. Bachelor of Arts; a first university degree in arts, literature, BA; B.A. Barium salts are typically white when solid and colorless when dissolved. Alchemists were attracted to them because after exposure to light they would glow for years. Copyright © 2020. The name barium originates from the alchemical derivative "baryta", from Greek βαρύς (barys), meaning "heavy". Boeing (BA) Gains But Lags Market: What You Should Know.

For this reason it is used as a radiocontrast agent in X-ray imaging of the digestive system ("barium meals" and "barium enemas"). W. Xu and M. Lerner, "A New and Facile Route Using Electride Solutions To Intercalate Alkaline Earth Ions into Graphite" BA is listed in the World's largest and most authoritative dictionary database of abbreviations and acronyms BA is listed in the World's largest and most authoritative dictionary database of abbreviations and acronyms [16] Davy, by analogy with calcium, named "barium" after baryta, with the "-ium" ending signifying a metallic element. Overview; Meet our team; Timeline; Location map; Our services. [14] Barium also has 10 meta states, of which barium-133m1 is the most stable with a half-life of about 39 hours. Bachelor of Arts 2. bankers' acceptance 3. bathroom 4. batting average 5. Barium was first isolated by electrolysis of molten barium salts in 1808 by Sir Humphry Davy in England. [7]:6 Barium metal is produced by reduction with aluminium at 1,100 °C (2,010 °F).

Historically, it was used as a getter for vacuum tubes and in oxide form as the emissive coating on indirectly heated cathodes. Ba + 2 ROH → Ba(OR) 2 + H 2 ↑ (R is an alkyl group or a hydrogen atom) Barium reacts with ammonia to form complexes such as Ba(NH 3) 6.: 3. Barite, left to right: appearance, graph showing trends in production over time, and the map showing shares of the most important producer countries in 2010.