Atomic Profile

Calcium (Ca)

Discover properties, shell configurations, industrial applications, compounds, and historical occurrences of the Calcium element.

20Ca40.078

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

Visualizing the concentric Bohr orbits and energy level shells for Calcium.

+20

Shell 1: 2e⁻ | Shell 2: 8e⁻ | Shell 3: 8e⁻ | Shell 4: 2e⁻

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

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)

Which of the following calcium compounds is the main constituent of limestone and chalk?

Watch educational lectures detailing the chemical extraction and molecular spectrums of Calcium.

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