Is the element calcium synthetic?
354354
No element is synthetic
179839
It depends on the salt. A salt of calcium, magnesium, or iron will form an insoluble compound that will precipitate with a soap molecule that is known as soap scum.\n\nHere is a typical reaction:\nCa2+(aq)  + 2C17H35COO-(aq)  ==> (C17H35COO-)2Ca2+(s)\n\nSodium chloride will not form a precipitate with soap as long as the soap is a carboxylate.\nhttp://dl.clackamas.cc.or.us/ch106-04/structur1.htm
753910
CaF2 is calcium fluoride. Sorry I messed up before.
906746
a)silver bromide\nb) tricalcium phosphate\nc)Lithum Hydride\nd)Radium Chloride
251733
Yes. It is called lime or quick lime and this is basic in nature.\n\nEXTRA: Calcium hydroxide is a chemical compound with the chemical formula Ca(OH)2. It is a colorless crystal or white powder, and is created when calcium oxide (called lime or quicklime) is slaked with water. It can also be created by mixing an aqueous solution of calcium chloride and an aqueous solution of sodium hydroxide. A traditional name for calcium hydroxide is slaked lime, or hydrated lime.\n\nIf heated, calcium hydroxide decomposes into calcium oxide and water. A suspension of fine calcium hydroxide particles in water, called lime water (or milk of lime), is a medium strength base that reacts violently with acids and attacks many metals in presence of water.
434401
I am pretty sure i did this right. using the CaCO3(s)as the limestone, i got 1178.934669 grams of CaO. (I didn't round the final answer, and w/in the problem itself, i rounded the atomic masses of Calcium (to 40.1), oxygen (to 15.9), and carbon (to 12)
783977
No, it does not. Einsteinium is synthetic, meaning that is made by humans and does not occur naturally.\n\nActually, all of the elements on the periodic table after uranium are man made (including Tc and Pm). Uranium is the heaviest element that will occur naturally in the universe.
430162
The second one.  The other three contains salts of calcium.
852228
The are made mostly from existing elements, they'll take an element and bomabard it with protons and it become a new synthetic element that doesnt occure normally, they do all exsist in nature but are really rare and in very minute quantities
742905
Yes it's the same element,except that in the human body it's an ionized form,not a metallic form, only traces are required or else it would cause severe poisoning causing CNS and liver malfunction.
218345
Actually, Calcium in it's pure form doesn't exist in nature, as it is highly reactive with water.  It is only found in compounds such as chalk (CaCO3), lime (Ca(OH)2) or gypsum (CaSO4), which can erode to very fine particles which then become SUSPENDED in water.
1167345
EDTA is a good chelating agent for Ca+2  but not for Na+
371226
Calcium(Ca+²) and Magnesium(Mg+²)
856042
Not clear what you are asking.\n\nIf you are asking if any elements exist as pure elements, not in any compounds, the answer is "no".\n\nBut there are quite a few elements that make up the human body in various proportions.  Carbon, Hydrogen, Oxygen, Sodium, Potassium, Chlorine, Nitrogen, Sulfur, Phosphorus, Iron, Magnesium, Calcium make up a good bit of your body.  But it is how they are combined that is important.
842817
Synthetic elements, in chemistry, radioactive elements that were not discovered occurring in nature but as artificially produced isotopes. They are technetium (at. no. 43), which was the first element to be synthesized, promethium (at. no. 61), astatine (at. no. 85), francium (at. no. 87), and the transuranium elements (at. no. 93 and beyond in the periodic table).
732214
Ca is II A elements which have 2 valence electron. Therefore it charges are 2+. Chlorine charges is -1 because of it have 7 valence electron. \nHence, to make a compound neutral one Ca must make bonds with two Chlorine, making CaCl2.\n\nNa is I A elements which have 1 valence electron. It have a charge of +1. Hence, to make the chloride of natrium, one natrium only can make a bond with one chlorine atom, resulting in NaCl.\n\npeace\nvixklen
751478
c since calcium carbonate  = CaCO3 and they react to produce calcium nitrate(Ca(NO3)2), carbon dioxide(CO2) and water(H2O).