- Calcium is a chemical element with atomic number 20 which means there are 20 protons in its nucleus. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs.
- In order to write the Calcium electron configuration we first need to know the number of electrons for the Ca atom (there are 20 electrons). When we write the configuration we'll put all 20 electrons in orbitals around the nucleus of the Calcium atom. In writing the electron configuration for Calcium the first two electrons will go in the 1s.
- Name: Calcium: Symbol: Ca: Atomic Number: 20: Atomic Mass: 40.078 atomic mass units: Number of Protons: 20: Number of Neutrons: 20: Number of Electrons: 20: Melting Point.
The shell of the chicken egg is primarily calcium carbonate. |
Name: Calcium Symbol: Ca Atomic Number: 20 Atomic Mass: 40.078 amu Melting Point: 839.0 °C (1112.15 K, 1542.2 °F) Boiling Point: 1484.0 °C (1757.15 K, 2703.2 °F) Number of Protons/Electrons: 20 Number of Neutrons: 20 Classification: Alkaline Earth Crystal Structure: Cubic Density @ 293 K: 1.55 g/cm 3 Color: Silvery Atomic Structure. The atomic number of calcium is 20, and atomic weight is 40.078. The density of calcium is 1.55 grams per cubic centimeter. Its melting point is 842 °C and boiling point is 1494 °C. Calcium is harder than lead but can be cut with a knife with effort.
Calcium
Atomic Number: | 20 | Atomic Radius: | 231 pm (Van der Waals) |
Atomic Symbol: | Ca | Melting Point: | 842 °C |
Atomic Weight: | 40.08 | Boiling Point: | 1484 °C |
Electron Configuration: | [Ar]4s2 | Oxidation States: | +2, +1[3] (a strongly basic oxide) |
History
From the Latin word calx, lime. Though lime was prepared by the Romans in the first century under the name calx, the metal was not discovered until 1808. After learning that Berzelius and Pontin prepared calcium amalgam by electrolyzing lime in mercury, Davy was able to isolate the impure metal.
Calcium Atomic Number And Weight
Sources
Calcium Number Of Protons
Calcium, a metallic element, is fifth in abundance in the earth's crust, of which it forms more than 3%. It is an essential constituent of leaves, bones, teeth, and shells. Never found in nature uncombined, it occurs abundantly as limestone, gypsum, and fluorite. Apatite is the fluorophosphate or chlorophosphate of calcium.
Properties
The metal has a silvery color, is rather hard, and is prepared by electrolysis of fused chloride and calcium fluoride (to lower the melting point).
Chemically it is one of the alkaline earth elements; it readily forms a white coating of nitride in air, reacts with water, burns with a yellow-red flame.
Uses
The metal is used as a reducing agent in preparing other metals such as thorium, uranium, zirconium, etc., and is used as a deoxidizer, desulfurizer, or decarburizer for various ferrous and nonferrous alloys. It is also used as an alloying agent for aluminum, beryllium, copper, lead, and magnesium alloys, and serves as a 'getter' for residual gases in vacuum tubes, etc.
Compounds
Its natural and prepared compounds are widely used. Quicklime (CaO), which is made by heating limestone that is changed into slaked lime by carefully adding water, is the great base of chemical refinery with countless uses.
Calcium Atomic Number 20
When mixed with sand, it hardens mortar and plaster by taking up carbon dioxide from the air. Calcium from limestone is an important element in Portland cement.
Calcium Protons
Solubility of the carbonate in water containing carbon dioxide is high, which causes the formation of caves with stalactites and stalagmites and is responsible for hardness in water. Other important compounds are the carbide, chloride, cyanamide, hypochlorite, nitrate, and sulfide.