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Transcript of Bismuth
Bi2O3 Brittle white metal with a pink tint (cc) photo by theaucitron on Flickr Used to get Mistaken for lead and tin He distinguished that Bismuth is its own element, and not another form of lead A french man named Claude Geoffroy was the first man to truly understand bismuth, he wrote a book in 1753. He is given credit with discovery because he made it identifiable Was known about in ancient times, just not in detail. History- Discovery Where does the name come from? A German Word: Weisse Masse Meaning: White Mass Describes how the element appears in nature The name was shortened to Wisuth, then to Bisemutum, until it finally came to be known as Bismuth Pronounced as Biz-muth Contains 5 valence electrons Electron Configuration Very flammable in powdered form Reacts with small amounts of Florine to make: BiF5 Reacts with sulfuric, nitric, and hydrochloric acids It's electric conductivity is very low It's colorful when it's lab-grown Melting Point: 520ºF
Boiling Point: 2847ºF Soft,
Breaks easily Atomic Radius is 143 pm Uses Used mainly in the manufacture of fusible alloys, alloys that melt at low temperatures. Fusible alloys are used in fire protection devices Used in cosmetics Used in thermopiles which measure radiant energy Used in pharmaceutical products associated with indigestion Dissolves in sulfuric acid to make Bismuth Sulfide Radioactive: Just a little Lowest thermal conductivity of all metals, except for mercury! One of the 1st metals to be discovered! Bismuth expands as it solidifies (like water), where as most materials contract as they become solids, they have a smaller volume Bismuth has an extremely slow rate of decay, if you only had 100 g of Bismuth-209 14 billion years ago, 99.99 g would still be around today! Some Facts The largest deposits of bismuth are found in Bolivia Electronegativity is 2.02 Classified as a metal and found in Family 15