Oxygen (O) - 8 on the Periodic Table | Periodic Table

Standard IUPAC: Oxygen • Symbol: O • Atomic Mass: 15.999 u

Quick Factsheet: Oxygen (symbol O, atomic number 8) is element 8 on the periodic table of elements. It has a standard atomic weight of 15.999 u and an electron configuration of [He] 2s2 2p4. On the periodic table, Oxygen is classified in period 2 and group Main.

1. Periodic Table Position of Oxygen (8 on the Periodic Table)

Element Oxygen has atomic number Z = 8, meaning it contains 8 protons in its atomic nucleus and 8 electrons in its neutral state. On the standard periodic table of elements, Oxygen is located in period 2 and group Main.

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

Full Electron Configuration: [He] 2s2 2p4

Common Oxidation States (Charges): -2c,-1,1,2

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

Element Oxygen has a standard atomic weight of 15.999 u. Its melting point is 54.8 K and boiling point is 90.2 K. The Pauling electronegativity value is 3.44.

Comprehensive chemical properties and data for Oxygen (O, Z=8).

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

4. Related Elements in the Same Chemical Family

H (Z=1) C (Z=6) N (Z=7) F (Z=9) P (Z=15) S (Z=16)

5. Frequently Asked Questions about Oxygen (FAQ)

What is the chemical symbol and atomic number of Oxygen?

The chemical symbol of Oxygen is O and its atomic number is 8.

What is the atomic mass and electron configuration of Oxygen?

Oxygen has a standard atomic mass of 15.999 u and ground-state electron configuration of [He] 2s2 2p4.

What periodic table group and period does Oxygen belong to?

Oxygen is located in period 2 and group Main on the periodic table of elements.

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