Calcium (Ca), element 20 – Learn Acer periodic table

Alkaline earth metal, atomic number 20.

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 Ca2+ is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.

Symbol Ca. Atomic mass 40.0784 u. Group 2, period 4. Electron configuration [Ar] 4s2. Electrons per shell 2, 8, 8, 2. State at room temperature: Solid. Melting point 841.9 °C, boiling point 1483.8 °C. Discovered by Humphry Davy.

Element data from Wikipedia, CC BY-SA 3.0.

Calcium (Ca), element 20 – Learn Acer periodic table

Calcium

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