radical

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energy-level diagram

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radical summary

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Coriander leaves, fresh green cilantro on wooden background, herbs

Why Does Cilantro Taste Like Soap to Some People?

Nativity Scene, Adoration of the Magi, Church of the Birth of the Virgin Mary, Montenegro

Why Is Christmas in December?

Monitor. Varanus salvadorii is a monitor lizard found in New Guinea can grows to 2.7 metres (9 ft.) aka Tree crocodile, Crocodile monitor, Salvadori's monitor, artellia, reptile

7 of the World’s Most Dangerous Lizards and Turtles

Ice Sledge Hockey, Hockey Canada Cup, USA (left) vs Canada, 2009. UBC Thunderbird Arena, Vancouver, BC, competition site for Olympic ice hockey and Paralympic ice sledge hockey. Vancouver 2010 Olympic and Paralympic Winter Games, Vancouver Olympics

10 Best Hockey Players of All Time

The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.

What If the President Is Impeached?

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

Colorful winter sunset

What's the Difference Between a Solstice and an Equinox?

radical: Facts & Related Content

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

Facts

Also Known As	free radical

Photos

energy-level diagram

See All Images →

Topics

cyclopentadienyl benzoyloxy allyl alkylidyne alkylidene triphenylmethyl naphthyl methyl ethyl diphenylnitrogen oxide diatomic molecule ion biomolecule configuration conformation monomer macromolecule molecular weight

Key People

Justus von Liebig

Justus, baron von Liebig

German chemist

Gerhard Herzberg

Canadian physicist

Friedrich Adolf Paneth

Austrian chemist

Moses Gomberg

American chemist