What is the atomic number of Oganesson?

Oganesson has atomic number 118, which means a neutral atom has 118 protons and 118 electrons.

What is the chemical symbol for Oganesson?

The chemical symbol for Oganesson is Og.

What category is Oganesson in?

Oganesson is classified as a noble gas and sits in period 7 of the periodic table.

Element 118

Oganesson (Og)

Oganesson is a chemical element with symbol Og and atomic number 118. It is named after the Russian nuclear physicist Yuri Oganessian. As a synthetic element, it can be created in a laboratory but is not found in nature.

Atomic Number

118

Atomic Mass

294 u

Period

Group

Group 18: noble gases

Phase

Predicted solid

Density

~5.0 (predicted) g/cm3

Electron Shells

2, 8, 18, 32, 32, 18, 8

Atomic Structure

Protons: 118. Electrons: 118. Neutrons: Varies by isotope.

Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d¹⁰ 7p⁶

Why Oganesson Matters

Oganesson helps connect atomic number 118, noble gas behavior, period 7 trends, and electron shell structure. Its Predicted solid phase, atomic mass of 294 u, and electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d¹⁰ 7p⁶ make it useful for comparing bonding patterns across the periodic table.

Discovery and Occurrence

Oganesson was discovered 2002 by Yuri Oganessian, Ken Moody. Oganesson is a chemical element with symbol Og and atomic number 118. It is named after the Russian nuclear physicist Yuri Oganessian. As a synthetic element, it can be created in a laboratory but is not found in nature.

Safety and Handling Context

Oganesson has radioactive isotopes or is commonly discussed with radioactive materials. Use this page as an educational reference; real samples require qualified supervision and controlled handling.

Related Elements

Frequently Asked Questions

What is the atomic number of Oganesson?: Oganesson has atomic number 118, which means a neutral atom has 118 protons and 118 electrons.
What is the chemical symbol for Oganesson?: The chemical symbol for Oganesson is Og.
What category is Oganesson in?: Oganesson is classified as a noble gas and sits in period 7 of the periodic table.

Explore Oganesson in 3D

Use the interactive table above to rotate atomic models, compare periodic trends, and move from Oganesson to neighboring elements without losing your place.