![]() Introduces stoichiometry and explains the differences between molarity, molality and normality. Related ResourcesĪnswers many questions regarding the structure of atoms. Common Chemical Compounds of Calcium ReferencesĪ list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.Pure calcium is a shiny soft metal that will react violently with water to produce hydrogen. It is found in limestone (CaCO 3) gypsum (CaSO 4. Why did it take so long? Calcium is the fifth most abundant metalic element in the earth's crust, but is never found in the elemental form because it is so reactive. Davy was then successful in isolating the impure metal. Berzelius and Pontin prepared calcium amalgam by electrolizing lime in mercury. Additional Notes: Calcium was prepared as lime by the Romans under the name calyx in the 1st century A.D., but the metal was not discovered until 1808.Calcium is an essential component shells, bones, teeth and plant structures. Also used as an alloying agent for aluminum, copper and lead, a reducing agent for beryllium and used in fertilizer, concrete & plaster of paris. Uses of Calcium: Used for dehydrating oils, decarburization and desulfurization of iron and its alloys, getter in vacuum tubes.World production in 2000 was around 112,000,000 tons (CaO). Sources of Calcium: Obtained from minerals like chalk, limestone & marble.Name Origin: Latin: calx, calcis (lime).70kg human: 1 kg Who / Where / When / How Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances. Vapor Pressure = C Regulatory / Health.Enthalpy of Atomization: 184 kJ/mole 25☌.Description: silvery, soft metal, tarnishes to grayish white after exposure to air.Conductivity Electrical: 0.298 10 6/cm Ω.Coefficient of lineal thermal expansion/K -1: 22E -6.Valence Electron Potential (-eV): 29 Physical Properties of Calcium.Incompatibilities: water, oxidizers, acids, air, chlorine, chlorine tri-fluoride, fluorine, oxygen, silicon, sulfur.Electronegativity: 1 (Pauling) 1.04 (Allrod Rochow).Electrochemical Equivalent: 0.7477g/amp-hr.Valence Electrons: 4s 2 Electron Dot Model. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |