Zirconium forms a variety of inorganic and organometallic compounds such as zirconium dioxide and zirconocene dichloride, respectively. The periodic table. A windows (pop-into) of information (full-content of Sensagent) triggered by double-clicking any word on your webpage. Rhodium ( /ˈroʊdiəm/ ROH-dee-əm) is a chemical element that is a rare, silvery-white, hard, and chemically inerttransition metal and a member of the platinum group. Many later transition metals, such as rhodium, are very commonly used in jewelry due to the fact that they are incredibly shiny.. Tellurium was discovered in Transylvania (today part of Romania) in 1782 by Franz-Joseph Müller von Reichenstein in a mineral containing tellurium and gold.  Although cadmium has no known biological function in higher organisms, a cadmium-dependent carbonic anhydrase has been found in marine diatoms. Zirconium forms a variety of inorganic and organometallic compounds such as zirconium dioxide and zirconocene dichloride, respectively. Tellurium ( /tɨˈlʊəriəm/ tə-LOOR-ee-əm or /tɛˈlʲʊəriəm/ te-LOOR-ee-əm) is a chemical elementthat has the symbol Te and atomic number 52. Periods have different lengths; the first period has only 2 elements (hydrogen and helium), while the second and third periods have 8 elements each. Mendeleev noted a gap in his periodic table and gave the undiscovered element the provisional name ekamanganese (Em). It is a soft, grey, ductile transition metal, which is often found in the pyrochloremineral, the main commercial source for niobium, and columbite. It will enhance any encyclopedic page you visit with the magic of the WIKI 2 technology.  The first excimer laser design used a xenon dimer molecule (Xe2) as its lasing medium, and the earliest laser designs used xenon flash lamps as pumps. Boron is the element that is atomic number 5 on the periodic table. Molybdenum minerals have long been known, but the element was "discovered" (in the sense of differentiating it as a new entity from the mineral salts of other metals) in 1778 by Carl Wilhelm Scheele. ), http://www.webelements.com/molybdenum/biology.html, http://environmentalchemistry.com/yogi/periodic/Rb.html, http://webmineral.com/help/FlameTest.shtml, http://www.chemguide.co.uk/inorganic/group1/reacto2.html, http://www.iupac.org/publications/books/rbook/Red_Book_2005.pdf, "Occupational Safety and Health Guideline for Yttrium and Compounds", http://www.osha.gov/SLTC/healthguidelines/yttriumandcompounds/recognition.html, "Greek mólybdos as a Loanword from Lydian", http://www.unc.edu/~melchert/molybdos.pdf, "In Raising the World’s I.Q., the Secret’s in the Salt", http://www.nytimes.com/2006/12/16/health/16iodine.html?fta=y, http://www.infoplease.com/ce6/sci/A0852881.html, http://adsabs.harvard.edu/abs/1988wdch...10.....R, http://www.chem.umn.edu/class/2301/barany03f/fun/beautiful1.pdf, http://books.google.com/?id=y1UgcgVSXSkC&pg=PA213, http://web.archive.org/web/20060822141910/http://www.millisecond-cine.com/history.html, http://books.google.com/?id=g93XXNA8Wf4C&pg=PA186, http://books.google.com/?id=zfvbyCHzVqMC&pg=PA48, http://www.nature.com/news/2002/020429/full/news020429-6.html, http://www.esa.int/SPECIALS/SMART-1/SEMLZ36LARE_0.html, Chemical elements in East Asian languages, http://en.wikipedia.org/w/index.php?title=Period_5_element&oldid=494103036. Rubidium is the first element placed in period 5.  Xenon is also being used to search for hypothetical weakly interacting massive particles and as the propellant for ion thrusters in spacecraft..  Although generally unreactive, xenon can undergo a few chemical reactions such as the formation of xenon hexafluoroplatinate, the first noble gas compound to be synthesized. Niobium ( /naɪˈoʊbiəm/) ny-OH-bee-əm or columbium (/kəˈlʌmbiəm/ kə-LUM-bee-əm), is a chemical element with the symbol Nb and atomic number 41. In addition, strontium, like rubidium, oxidizes in air and turns a yellow color.  Over half of the supply of palladium and its congener platinum goes into catalytic converters, which convert up to 90% of harmful gases from auto exhaust (hydrocarbons, carbon monoxide, and nitrogen dioxide) into less-harmful substances (nitrogen, carbon dioxide and water vapor). Yttrium ( /ˈɪtriəm/ IT-ree-əm) is a chemical element with symbol Y and atomic number 39. Tin is the 49th most abundant element and has, with 10 stable isotopes, the largest number of stable isotopes in the periodic table. Indium was discovered in 1863 and named for the indigo blue line in its spectrum that was the first indication of its existence in zinc ores, as a new and unknown element. Tin shows chemical similarity to both neighboring group 14 elements, germanium and lead and has two possible oxidation states, +2 and the slightly more stable +4. This list contains the 118 elements of chemistry. While many medical antimicrobial uses of silver have been supplanted by antibiotics, further research into clinical potential continues.