xenon

Table of Contents

References & Edit History Quick Facts & Related Topics

Images

Explore an interactive periodic table of the elements

first ionization energies of the elements

For Students

Read Next

Highway Night Traffic Portland, drive, driving, car, automobile.

What's the Difference Between Speed and Velocity?

Lightning over the outskirts of Oradea, Rom., during the thunderstorm of August 17, 2005.

16 Questions About Earth’s Atmsophere and Weather Answered

Chemical equations Chemical reactions chemistry

How Do You Balance a Chemical Equation?

Illustration of molecules. (molecular, chemistry, science)

Why Is a Group of Molecules Called a Mole?

Above the clouds 130 nautical miles below, astronaut Mark C. Lee floats freely without tethers as he tests the new Simplified Aid for Extravehicular Activity (EVA) Spacewalk Rescue (SAFER) system, Sept. 16, 1994. Space Shuttle Discovery, STS-64

Gravity: From Apples to the Universe

Discover

Turtle, tortoise, reptile. Uses assets 88582 & 89606

What’s the Difference Between a Turtle and a Tortoise?

Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)

All 119 References in “We Didn’t Start the Fire,” Explained

Happy, smiling, flying pig

7 Everyday English Idioms and Where They Come From

Germans from East and West stand on the Berlin Wall in front of the Brandenburg Gate in the November 10, 1989, photo, one day after the wall opened.

Timeline of the 1980s

An ancient egyptian hieroglyphic painted carving showing the falcon headed god Horus seated on a throne and holding a golden fly whisk. Before him are the Pharoah Seti and the goddess Isis. Interior wall of the temple to Osiris at Abydos, Egypt.

11 Egyptian Gods and Goddesses

The field takes the turn one after the restart during the 103rd Indianapolis 500 at Indianapolis Motor Speedway on May 26, 2019 in Indianapolis, Indiana. (auto racing, Indy 500)

Why Is the Indy 500 Held on Memorial Day Weekend?

A mug shot taken by the regional Colombia control agency in Medellin

Pablo Escobar: 8 Interesting Facts About the King of Cocaine

xenon: Facts & Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Last Updated: May 26, 2025

News •

Everest: British soldiers make history with new method • May 21, 2025, 7:49 AM ET (BBC)

Facts

Also Known As	Xe

Photos

first ionization energies of the elements

See All Images and Interactives →

Topics

xenon-129 air chemical element noble gas hydrogen carbon sodium nitrogen sulfur phosphorus boron iodine fluorine zinc

Dig Deeper: More Articles That Discuss This Topic

noble gas: Introduction

Key People

William Ramsay

Sir William Ramsay

British chemist

Quiz

Periodic Table of the elements concept image (chemistry)

Facts You Should Know: The Periodic Table Quiz

Concept artwork on the periodic table of elements.

118 Names and Symbols of the Periodic Table Quiz