![]() It has a melting point of 842°c and a boiling point of 1484°c. It is located in Group 2 as an Alkaline earth metal which is very reactive with water. It is a reactive metal so is not found naturally in the earth’s crust, instead existing as a compound most commonly Calcium Carbonate (Limestone). Calcium is also used in the paper industry as a bleach and in electrical insulators. In the human body Calcium and Vitamin D interact to improve the uptake of Calcium into bones. A deficiency of calcium can lead to severe diseases such as osteoporosis and osteomalacia. It has a wide variety of uses in the food industry as a supplement for the human body where it is important in nerve transmission and bone strength. Well, in the video on atomic weight and on atomic mass, we see that the atomic weight is the weighted average of the atomic masses of the various isotopes of that element. An alkaline earth metal, calcium is a reactive silvery metal that forms a dark oxide. Another such example would be the symbol ‘Fe’ which is used to denote Iron and can be traced to the Latin word for iron, Ferrum. An example for this is silver which is denoted by Ag from its Latin name Argentum. Calcium compounds have been known for years from the early days of sculpture using Calcium Carbonate (Limestone) but it was not until 1808 that Sir Humphry Davy isolated Calcium using electrolysis on a mixture of Calcium oxide and Mercuric Oxide. Calcium is a chemical element with symbol Ca and atomic number 20. Most of the symbols are similar to the name of the element but some symbols of elements have Latin roots. ![]() (The mass of one mole of sodium is 22.99 g. Determine the number of atoms in 51.0 grams of sodium, Na. (The mass of one mole of calcium is 40.08 g.) 1.34 × 10² atoms. How many moles of calcium atoms do you have if you have 3.00 × 10²¹ atoms of calcium. ![]() It has the symbol Ca.Ĭalcium is an Alkaline earth metal in Group 2 of the periodic table that is the fifth most abundant element in the earths crust, forming compounds such as limestone and fossils. What is the value of Avogadros number 0.00498 mol. Factor Al 2 O 3: 101.96128: 0.529251: As 2 O 3: 197.89: 0.7574: Au 2 O: 409.93: 0.9610: B 2 O 3: 69.6182: 0.310551: BaO: 153.3394: 0.895660: BeO: 25. It is an Alkaline Earth Metal and is located in Group 2 of the periodic table. Calcium (Ca) is a silvery-white soft metal that has the atomic number 20 in the periodic table.
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