Calcium (symbol Ca) is element number 20 of the periodic table and belongs to the “Alkaline earth metal” category. Its atomic mass is about 40.078, and its phase under standard conditions is Solid. This element sits in period 4 and group 2 of the periodic table, and its electrons are arranged in shells of 2, 8, 8, 2. The short electron configuration of Calcium is [Ar] 4s². Known uses of Calcium include Bones and teeth, Cement and Cheese.
The electron configuration of Calcium (Ca), with 20 electrons, is shown below. The last shell (shell 4) is highlighted:
Distribution of 20 electrons of Calcium across shells K to N:
The alkaline earth metals are the group 2 elements: reactive metals, harder than the alkali metals and with higher melting points, that usually form ions with a +2 charge.
The atomic number of Calcium (Ca) is 20; that is, every atom of it has 20 protons.
The electron configuration of Calcium (Ca) is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²; in short form it is [Ar] 4s², and its last shell is 4s².
The chemical symbol of Calcium is Ca.
Calcium is located in period 4 and group 2 and belongs to the “Alkaline earth metal” category.
The atomic mass of Calcium is about 40.078 (atomic mass units).
The phase of Calcium under standard conditions is Solid.
Uses of Calcium include Bones and teeth, Cement and Cheese.
Calcium was discovered by Humphry Davy in 1808.
Beryllium (Be)Magnesium (Mg)Strontium (Sr)Barium (Ba)Radium (Ra)
Beryllium (Be)Magnesium (Mg)Strontium (Sr)Barium (Ba)Radium (Ra)
