![]() These are only observable during a chemical reaction. Malleability: Capable of being shaped or bent.Ductility: It can be beaten into extremely thin sheets.These are observed without changing the substance into another substance. These are those properties that can be observed using our senses such as colour, lustre, freezing point, boiling point, melting point, density, hardness, and odour. Properties of calcium can be categorized as physical and chemical. ![]() It is vital for the maintenance of bones and teeth.Ĭalcium ions on bone surfaces interact with those present in the bodily fluids, therefore enabling ion exchange, which is essential in maintaining the balance of calcium in the blood and bone.Ĭalcium circulating in the blood is involved in several vital processes including coagulation, nerve signal transmission, hormone signaling, and muscle contraction.Ĭalcium may be used as a reducing agent in the process of metal extraction.Ĭalcium is also used in the production of some metals, as an alloying agent.Ĭalcium carbonate is used to make cement and mortar and also in the glass industry. The biological use of calcium is to provide strength and structure to the skeleton. The atomic data of calcium is as follows: The crystal structure of calcium is cubic. So we can see it has 2 electrons in its valence shell, hence its valency is 2. 20 electrons occupy available electron shells (rings). The nuclear composition of an atom of calcium-40 (atomic number: 20), the most common isotope of this element consists of 20 protons and 20 neutrons. The density of calcium is 1.54 gm/cm³.Important isotopes of calcium include 48Ca, 46Ca, 44Ca, 43Ca, 42Ca, and 40Ca.CAS number for calcium is. It has a melting point of 842°c and a boiling point of 1484°c. At 20°c, this element is present in solid-state. The location of calcium elements in the modern periodic table is the 2nd group,4th period, and 's' block. The chemical symbol of calcium is 'Ca'.Its atomic number is 20 and its atomic mass is 40.078 g/mol. There are various uses of calcium and it is one of the most important chemical elements. ![]() In the physiological and biochemical processes of organisms and cells, calcium ions have an important role as electrolytes. Calcium is found to be the most abundant metal and when talking about the human body it is the fifth most abundant element in the human body. Sir Humphry Davy discovered calcium in 1808. Its physical and chemical properties are most similar to its heavier homologs strontium and barium. Calcium being an alkaline earth metal, it forms a dark oxide-nitrate layer due to its high reactivity and when exposed to the air. Group 2 elements of the modern periodic table are known as alkaline earth metals (except Beryllium). So our masses 2.662 to 4 times 10 to the negative 22 grams divided by the volume over unit cell, which is 1.730 times, 10 to the negative, 22 centimeters cube, and we get a density of 1.54 after the ground, um, grams per centimeter cube.Calcium is an alkaline earth metal. We just found the mass and we also found the volume. And lastly, we're gonna find the density using the equation. And this gives us a mass of 2.662 to 4 kinds. And this divided by Alma gliders number which is 6.0 to 2 times 10 to the 23rd Adams, her mole. So we get four multiplied by the molar mass of calcium, which is 4.8 grams per mole. And next we're going to determine the mass of four calcium atoms in one unit self so the mass of the cell will be equal to four times the mass of calcium. So this is equal to 1.730 times 10 to the negative, 22 centimeters Cute. And now we're gonna find the volume of one unit cell using the edge length so our volume will be equal to our edge length 5.572 times 10 to the negative, eight centimeters and we're going to Cuba since, you know, we have to find the volume. Eight centimeters equals, uh, d, divided by two route to and D or edge length is equal to 5.572 times 10 to the negative eight centimeters. A radius is 1.97 times 10 to the negative. Next, we're gonna determine the edge length of one unit cell using the equation radius is equal to DE which is our edge length divided by two uh, Ruutu. This is because there are 10 to the 10 Pekan leaders in one centimeter and this gives us 1.97 times 10 to the negative eight centimeters, so that is a radius in centimeters. We're gonna multiply 1 97 by one centimeter over 10 to the 10 PICO meters. ![]() So our radius is 1 97 PICO meters and we have to convert this into centimeters. From this information, we have to find the density of the solid. And we know that the atomic radius of calcium was 197 PICO meters. So those question explains that calcium crystallizes through cubic closest packing. ![]()
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