The Element Calcium


Calcium does not usually occur in its elementary state. What can be easily found is mineral calcite, dolomite and gypsum which contains calcium. It also occurs in silicate minerals in metamorphic rocks. However the case is that in its elementary form it would be a reactive soft metal. One of the most common ways to extract calcium is through electrolysis from a fused salt such as calcium chloride.

Its main uses include usage as a reducing agent for extracting other metals such as uranium, zirconium and thorium; as a deoxidizer, de-carbonizer or de-sufurizer for various non ferrous alloys.  

Atomic Number & Chemical Properties


Element Basics:

Chemical Symbol: Ca
Atomic Number: 20
Atomic Weight: 40.078
Element Classification: Alkaline-earth Metal
Discovered By: Sir Humphrey Davy
Date of Discovery: 1808 (England)
Origin of Name: Latin: calx, calcis (lime).

How to Recognize it at a Party:

Fairly hard, silvery-white metal

Seriously Atomic Information:

Density (g/cc): 1.55
Melting Point (°K): 1112
Boiling Point (°K): 1757
Atomic Radius (pm): 197
Atomic Volume (cc/mol): 29.9
Covalent Radius (pm): 174
Ionic Radius: 99 (+2e)
Pauling Negativity Number: 1.00
First Ionizing Energy (kJ/mol): 589.4
Oxidation States: 2
Electronic Configuration: [Ar] 4s2

Getting Intimate with Calcium:

Lattice Structure: Face-Centered Cubic (FCC)
Lattice Constant (Å): 5.580
Lattice C/A Ratio: n/a
Specific Heat (@20°C J/g mol): 0.653
Fusion Heat (kJ/mol): 9.20
Evaporation Heat (kJ/mol): 153.6
Thermal Conductivity (@25°C W/m K):
Debye Temperature (°K): 230.00


Society's Questions About Calcium:

Have you ever wondered what everyone else in the world thinks about Calcium? Is anyone else looking for it too? If so, why? What do they want?

The following list shows the most common online questions about the element Calcium. Are your questions the same or different from everyone else's?

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