topic study on financial_research

May 28th, 2015
Studypool Tutor
Abraham Lincoln University
Price: $25 USD

Tutor description

Radium is the heaviest alkaline earth metal; its chemical properties mostly resemble those of barium. When exposed to air, radium reacts violently with it, forming radium nitride,[1] which causes blackening of this white metal. It exhibits only +2 oxidation state in solution. Radium ions do not form complexes easily, due to highly basic character of the ions. Most radium compounds coprecipitate with all barium, most strontium, and most lead compounds, and are ionic salts. The radium ion is colorless, making radium salts white when freshly prepared, turning yellow and ultimately dark with age owing to self-decomposition from the alpha radiation. Compounds of radium flame red-purple and give a characteristic spectrum. Like other alkaline earth metals, radium reacts violently with water and oil to form radium hydroxide and is slightly more volatile than barium, which leads to lesser solubility of radium compounds compared to those of corresponding barium ones. Because of its geologically sh

Word Count: 10380
Showing Page: 1/25
RadiumFrom Wikipedia, the free encyclopediaJump to: navigation, search This article is about the chemical element. For other uses, see Radium (disambiguation).This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (January 2011)francium radium actiniumBaRaUbn88RaPeriodic tableAppearancesilvery white metallicGeneral propertiesName, symbol, numberradium, Ra, 88Pronunciation/redim/ray-dee-mElement categoryalkaline earth metalGroup, period, block2,7, sStandard atomic weight(226)Electron configuration[Rn] 7s2Electrons per shell2, 8, 18, 32, 18, 8, 2 (Image)Physical propertiesPhasesolidDensity (near r.t.)5.5 gcm3Melting point973K,700C,1292FBoiling point2010K,1737C,3159FHeat of fusion8.5 kJmol1Heat of vaporization113 kJmol1Vapor pressureP (Pa)1101001 k10 k100 kat T (K)8199061037120914461799Atomic propertiesOxidation states2 (strongly basic oxide)Electronegativity0.9 (Pauling scale)Ionization energies1st: 509.3 kJmol12nd: 979.0 kJmol1Covalent radius2212 pmVan der Waals radius283 pmMiscellaneaCrystal structurebody-centered cubicMagnetic orderingnonmagneticElectrical resis

Review from student

Studypool Student
" Excellent work as always thanks so much "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1824 tutors are online

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors