| Formula / Notation | Ca |
|---|---|
| CAS Number | 7440-70-2 |
| Molecular Weight | 40.08 |
| Melting Point | 842.0 |
| Boiling Point | 1484.0 |
| Density | 1.55 |
| Solubility | Reacts slowly with water |
| Appearance | Soft, grey metal with dull silver lustre |
| Also Known As | Ca, calcium metal |
| Category | Elements |
What is Calcium?
Calcium is a soft, grey alkaline earth metal, atomic number 20. Fifth most abundant element in Earth crust. Essential for life - major component of bones, teeth, shells. Calcium ions regulate muscle contraction and nerve signalling.
Formula & Notation
IUPAC Name: Calcium
Other Names / Synonyms: Ca, calcium metal
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 842.0 |
| Boiling Point | 1484.0 |
| Density | 1.55 |
| Molecular Weight | 40.08 |
| Solubility | Reacts slowly with water |
| Appearance | Soft, grey metal with dull silver lustre |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Calcium is a soft, grey alkaline earth metal, atomic number 20. Fifth most abundant element in Earth crust. Essential for life - major component of bones, teeth, shells. Calcium ions regulate muscle contraction and nerve signalling.
Cement and concrete (calcium silicates). Steel production (deoxidiser, desulfuriser). Lime (CaO) for construction and soil treatment. Calcium carbonate (limestone, chalk, marble). Dietary calcium supplement. Water hardness. Calcium chloride (deicing, desiccant).
Calcium metal reacts with water: Ca + 2H2O -> Ca(OH)2 + H2. Calcium oxide (CaO quicklime) violently exothermic with water - burns. Calcium hydroxide: corrosive (pH 12.4). Calcium dust: skin and eye irritant.
The formula or notation for Calcium is: Ca