Calcium (Ca) - 20 on the Periodic Table | Periodic Table

Standard IUPAC: Calcium • Symbol: Ca • Atomic Mass: 40.078 u

Quick Factsheet: Calcium (symbol Ca, atomic number 20) is element 20 on the periodic table of elements. It has a standard atomic weight of 40.078 u and an electron configuration of [Ar] 4s2. On the periodic table, Calcium is classified in period 4 and group Main.

1. Periodic Table Position of Calcium (20 on the Periodic Table)

Element Calcium has atomic number Z = 20, meaning it contains 20 protons in its atomic nucleus and 20 electrons in its neutral state. On the standard periodic table of elements, Calcium is located in period 4 and group Main.

2. Electron Configuration & Oxidation States (Calcium Charges & Configuration)

Full Electron Configuration: [Ar] 4s2

Common Oxidation States (Charges): 1,2c

3. Physical Properties & Atomic Mass (Calcium Atomic Mass)

Element Calcium has a standard atomic weight of 40.078 u. Its melting point is 1115. K and boiling point is 1757. K. The Pauling electronegativity value is 1.0.

Comprehensive chemical properties and data for Calcium (Ca, Z=20).

Explore interactive 3D electron orbitals, isotopes, and properties on the periodic table: Open on Interactive Table 🚀

4. Related Elements in the Same Chemical Family

Be (Z=4) Mg (Z=12) Sr (Z=38) Ba (Z=56) Ra (Z=88)

5. Frequently Asked Questions about Calcium (FAQ)

What is the chemical symbol and atomic number of Calcium?

The chemical symbol of Calcium is Ca and its atomic number is 20.

What is the atomic mass and electron configuration of Calcium?

Calcium has a standard atomic mass of 40.078 u and ground-state electron configuration of [Ar] 4s2.

What periodic table group and period does Calcium belong to?

Calcium is located in period 4 and group Main on the periodic table of elements.

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