Symbol: CaFrom the Latin calx meaning lime. It was used as a building material as early as 7000 to 14000 BC. Determine when and how this metal was discovered (and, if possible, who discovered this metal). This metal was discovered in Khafajah in Mesopotamia; around 2500 BC (date of the first furnace). The ancient Romans prepared lime as calcium oxide. However this could not be the first scientific date of the discovery; this is because it has not been discovered, isolated and named. An English scientist named Humphry Davy was the first person to isolate calcium, this was done in 1808 by mixing mercuric oxide and lime; he then performed an electrolysis of the mixture. Davy then used electrolysis to isolate substances including barium, magnesium and strontium. Research the properties of the metal, its relative abundance on Earth, and the ways in which this metal can be used. Calcium is a solid, with a melting point of 〖842〗^ 0C. The boiling point of calcium is 〖1484〗^0C. It is a shiny and soft substance. The estimated crustal abundance of calcium is 4.15*〖10〗^4 milligrams per kilogram. The estimated ocean abundance of calcium is 4.12*〖10〗^2. This metal can be used to remove oxygen, sulfur and carbon from some alloys. Because calcium has high reactivity with common materials, it is rarely used as a metal. Calcium metal is used as a reducing agent in the preparation of other metals such as thorium and uranium. Calcium is also used in a mixture composed of calcium carbonate; used as a building material (limestone). You need to include why and how the metal is mined. Calcium is extracted via electrolysis (2CaO ----- > 2Ca + O2). This yields a purity of 98.6%, which can be further extracted to 99.5% by sublimation. Once extracted it forms into a n......paper medium......ciumcarbonate. Calcium chloride is also a byproduct in the Solway process used to produce soda ash. CaCO3 + 2HCl → CaCl2 + H2O + CO2 Alternatively, and on a small scale, calcium can be produced through the reduction of CaO with aluminum or of CaCl2 with metallic sodium6CaO + 2Al → 3Ca + Ca3Al2O6CaCl2 + 2Na→ Ca + 2NaClBibliographyReferencesLenntech.com, (2014). Calcium (Ca) - Chemical properties, health and environmental effects. [online] Available at: http://www.lenntech.com/periodic/elements/ca.htm [Accessed 13 May. 2014].News-medical.net, (2014). Uses of football. [online] Available at: http://www.news-medical.net/health/Uses-of-Calcium.aspx [Accessed 13 May. 2014].Webelements.com, (2014). WebElements Periodic Table of Elements | Football | uses. [online] Available at: https://www.webelements.com/calcium/uses.html [Accessed 13 May. 2014].