8/18/2023 0 Comments Ca element chemistry![]() In a neutral atom there are as many electrons as protons moving about nucleus. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10 -19 coulombs. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. The nucleus is composed of protons and neutrons. The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons. K) 22.3 Thermal Conductivity 200 Specific Heat 0.63 Heat of Fusion 8.54 Heat of Vaporization 153.3 Atomic Number of CalciumĬalcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure.They have created a complete suite of short videos on every element on the periodic table of elements.Calcium – Properties Element Calcium Atomic Number 20 Symbol Ca Element Category Alkaline Earth Metal Phase at STP Solid Atomic Mass 40.078 Density at STP 1.55 Electron Configuration 4s2 Possible Oxidation States +2 Electron Affinity 2.37 Electronegativity 1 1st Ionization Energy 6.1132 Year of Discovery 1808 Discoverer Davy, Sir Humphry Thermal properties Melting Point 842 Boiling Point 1484 Thermal Expansion µm/(m The video below is from the University of Nottingham's periodic videos project. Ĭalcium has six isotopes found in nature: Symbol acid rain) and heat (especially from human processign) are particularly good at breaking down calcium carbonate and bicarbonate into calcium oxide and carbon dioxide (and water, in the case of bicarbonate breakdown). Through weathering and human activities, the calcium carbonate can be made to break down, releasing the stored carbon dioxide. Calcium carbonate can react with carbon dioxide saturate water and for calcium bicarbonate (Ca(HCO 3) 2).The formation of carbonate (CO 3) often involves the capture of CO 2.Ĭalcium Carbonate as part of the Carbon Dioxide CyleĬalcium carbonate compounds (limestone, shells, etc.) are natural carbon sinks in two ways: Calcium carbonate is also used as an antacid for indigestion. Lime is still used today in substances like paints, concrete, cement, and plaster.Ĭalcium compounds (such as calcium carbonate or calcium magnesium pills) are often used as calcium supplements for human consumption. Historically, calcium was used to create lime (a calcium oxide and/or hydroxide compound), which was used as a building material. It is used primarily in the creation of steel to improve the steel's mechanical properties. Calcium usesĬalcium is used as a reducing and/or alloying agent for metals. Stalagmites and stalactites in caves form from calcium carbonate precipitating out of solution. Calcium carbonate is a naturally occurring compound that is the basis for limestone, marble, and chalk. It is naturally found in bones, teeth, shells, rocks, and minerals. Some of its properties are listed below: Atomic weightĬalcium is an alkaline Earth mineral. Ĭalcium is the 20 th element on the periodic table of elements and it is the fifth most abundant element in the earth's crust. ![]() Calcium, with atomic number 20 and atomic weight of 40.078.
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