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Transcript of Barium
My name is Carl Wilhelm Scheele, and I was born in 1742, growing up to be a Swedish Pomeranian pharmaceutical chemist.
Although Sir Humphry Davy isolated the pure element barium in 1808, I originally discovered barium in Uppsala, Sweden in the year 1774.
During my research, I developed a habit of smelling and tasting the chemicals and elements I worked with. Doctors say I died from mercury poisoning.
Barium is an element placed in group 2, period 6.
Sir Humphry Davy
Carl Wilhelm Scheele
Because it is in group 2 (column 2) on the periodic table, this tells us it has 2 valence electrons.
And because it's in the sixth period (row 6) on the table, this tells us that it has 6 energy levels.
Barium is a soft Alkaline Earth Metal with a silvery-white appearance. At both room temperature and room pressure, barium has a body centered cubic structure, or rather, looks like a cube.
http://www.youtube.com/watch?v=in2QVK3DRX s (space before s)
Gray, Theodore W., and Nick Mann. The Elements: A Visual Exploration of Every Known Atom in the Universe. New York: Black Dog & Leventhal, 2009. Print.
By: Jocelyn Guzman
Barium, less reactive than the metals in group one of the periodic table, though still a bit unstable, ignites when it is exposed to moist air.
It also forms compounds, most of them poisonous, with other metals including zinc, aluminum, and lead.
Barium sulfate, barium carbonate, and barium nitrate are used more than the pure element barium.
Barium sulfate is used in paint to make it a more pure white.
Barium carbonate is used in rat poison.
Barium nitrate is used to make green fireworks.
Barium's name comes from the Greek word "barys" (βαρύς), which means heavy, though the element itself is known for being light, even being less dense than titanium.
Well, that ends my presentation on barium.
Credits to these places for the information gathered:
Its atomic number is 56, and its atomic mass is 137.327 (137).