Properties of Calcium (Ca)
Calcium is a chemical element with the symbol (Ca) and atomic number 20. It is an essential mineral for living organisms, playing a crucial role in various physiological processes. In the human body, calcium is primarily known for its role in the formation and maintenance of strong bones and teeth. It also plays a key role in muscle contraction, blood clotting, and nerve signal transmission.
The following table provides a comprehensive list of calcium (Ca) properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Crystal Structure | Face-centered cubic (fcc) |
| Atomic Number | 20 |
| Molar Mass | 40.078 g/mol |
| Density | 1550 kg/m3 |
| Mechanical Properties | Metric |
| Young’s Modulus (E) | 19.6 GPa |
| Shear Modulus (G) | 7.85 GPa |
| Bulk Modulus (K) | 17.45 GPa |
| Poisson’s Ratio (ν) | 0.31 |
| Mohs Hardness | 1.75 |
| Thermal Properties | Metric |
| Melting Point | 842 °C |
| Boiling Point | 1484 °C |
| Thermal Conductivity (27°C) | 200 W/m·K |
| Specific Heat Capacity (Cp) (25°C) | 647 J/kg·K |
| Coefficient of Thermal Expansion (αL) (25°C) | 2.23×10-5 1/°C |
| Electrical Properties | Metric |
| Electrical Resistivity | 3.42×10-6 Ω·cm |
Unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)