DEFINITION: The artifacts and ecofacts used by a group to cope with their physical and social environment. Material culture includes the buildings, tools, and other artifacts that constitute the material remains of a former society -- its technology and artifacts combined.
Calcium is a chemical element with symbol Ca and atomic number 20. Calcium is a soft gray alkaline earth metal, fifth-most-abundant element by mass in the Earth 's crust. The ion Ca 2+ is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.alcium salts are colorless from any contribution of the calcium, and ionic solutions of calcium (Ca 2+) are colorless as well. As with magnesium salts and other alkaline earth metal salts, calcium salts are often quite soluble in water.
How many moles of calcium atom does it contain? The answer is one half of a mole, because 1 mole is equal to 6.02 x 10^23 atoms, so a half of a mole would be equal to 3.01 x 10^23 atoms. Okay, so if it contains 0.5 moles of calcium atoms, how much mass would that have? The answer is about 20 grams.f 1 atom of helium has a mass of about 4 amu, then 1 mole of helium atoms will have a mass of 4 grams. We were asked about 2 moles, so we would need to double this value, getting 8 grams!