Element Rubidium

Origin of name from the Latin word rubidius substance smuggled loss or deepest red. Atomic Number37 symbolic representationRb Atomic Weight85. 4678 Say what? Rubidium is pronounced asroo-BID-ee-em. DiscoveryR. Bunsen, G. Kirchoff 1861 (Germany), discovered rubidium in the mineral petalite via its dark red spectral lines. Element ClassificationAlkali Metal Density (g/cc)1. 532 melt Point (K)312. 2 Boiling Point (K)961 Appearancesoft, silvery-white, highly antiphonal metal Atomic Radius (pm)248 Atomic Volume (cc/mol)55. 9 covalent Radius (pm)216 Ionic Radius147 (+1e) Specific arouse (20C J/g mol)0. 360 Fusion Heat (kJ/mol)2. 0 Evaporation Heat (kJ/mol)75. 8 Pauling Negativity Number0. 82 First Ionizing Energy (kJ/mol)402. 8 Oxidation States+1 Lattice StructureBody-Centered Cubic Lattice unvaried (A)5. 590 CAS Registry Number7440-17-7 PropertiesRubidium may be liquid at room temperature. It ignites spontaneously in air and reacts violently in water, move fire to the liberated hy drogen. Thus, rubidium must be stored under prohibitionist mineral oil, in a vacuum, or in an inert atmosphere. It is a soft, silvery-white metallic element of the alkali group. Rubidium forms amalgams with mercury and alloys with gold, sodium, potassium, and cesium.Rubidium glows red-violet in a flame test. Rubidium Trivia Rubidium melts just a brusque above body temperature. Rubidium was discovered using spectroscopy. When Bunsen and Kirchoff examined their hear of petalite, they found two red spectral lines deep into the red interrupt of the spectrum. They named their new element rubidium after the Latin wordrubidusmeaning deepest red. Rubidium is the second most electropositive element. Rubidium can be used to give fireworks a red-violet color. Rubidium is the 23rdmost considerable element in the Earths crust. Rubidium chloride is used in biochemistry as a biomarker to track where potassium is taken up by living organisms. The hyper-fine negatron structure of Rubidiu m-87 is used in some atomic clocks to aver accuracy. The isotope Ru-87 was used by Eric Cornell, Wolfgang Ketterle, and Carl Wiemen to produce a Bose-Einstein condensate. This earned them the 2001 Nobel Prize in Physics. Reference http//chemistry. about. com/od/elementfacts/a/rubidium. htm http//www. lenntech. com/periodic/elements/rb. htm http//www. webelements. com/rubidium/ http//education. jlab. org/itselemental/ele037. html pic