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Atomic Profile
Calcium (Ca)
Discover properties, shell configurations, industrial applications, compounds, and historical occurrences of the Calcium element.
20Ca40.078
Physical Properties
Melting Point842 °C
Boiling Point1484 °C
Density1.55 g/cm³
Electronegativity1.00
Group / PeriodGroup 2, Period 4
Electronic Config[Ar] 4s²
Bohr Shells2, 8, 8, 2
Bohr Electron Model
Visualizing the concentric Bohr orbits and energy level shells for Calcium.
+20
Shell 1: 2e⁻ | Shell 2: 8e⁻ | Shell 3: 8e⁻ | Shell 4: 2e⁻
Origin & Abundance
Discovery Details
Discovered by Humphry Davy in the year 1808.
Natural Occurrence
Fifth most abundant element in Earth's crust. Forms massive deposits of limestone, chalk, and marble (calcium carbonate).
Common Uses & Applications
- Building mortar and concrete (Cement)
- Bone and tooth mineralization structural health
- Dietary calcium supplements
- Deoxidizer in steel refinement
Common Chemical Compounds
Below are typical molecular compounds formed by Calcium interacting with other elements:
CaCO₃ (Calcium Carbonate)CaO (Calcium Oxide / Quicklime)Ca(OH)₂ (Calcium Hydroxide)CaSO₄·2H₂O (Gypsum)
Element Concept Check
Which of the following calcium compounds is the main constituent of limestone and chalk?
Video Lectures & Fact Files
Watch educational lectures detailing the chemical extraction and molecular spectrums of Calcium.
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