isotope

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What are isotopes and how do they work?

Using radioisotopes for medical diagnosis and treatment

phase diagrams of helium-3 and helium-4

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Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere

Why Do Some Cicadas Appear Only Every 17 Years?

A Factory Interior, watercolor, pen and gray ink, graphite, and white goache on wove paper by unknown artist, c. 1871-91; in the Yale Center for British Art. Industrial Revolution England

Inventors and Inventions of the Industrial Revolution

earthquake. Heavily damaged school in the town of Yingxiu after a major earthquake struck China's Sichuan Province on May 12, 2008.

The 6 Deadliest Earthquakes Since 1950

Black widow spider

9 of the World’s Deadliest Spiders

In this aerial photo, structures are damaged and destroyed October 15, 2005 in Balakot, Pakistan. It is estimated that 90% of the city of Balakot was leveled by the earthquake. The death toll in the 7.6 magnitude earthquake that struck northern Pakistan on October 8, 2005 is believed to be 38,000 with at least 1,300 more dead in Indian Kashmir. SEE CONTENT NOTES.

6 of the World’s Deadliest Natural Disasters

Vietnam War. U.S. President Lyndon B. Johnson awards the Distinguished Service Cross to First Lieutenant Marty A. Hammer, during a visit to military personnel, Cam Ranh Bay, South Vietnam, October 26, 1966. President Johnson

Vietnam War Timeline

Solar eclipse of the sun.

The Sun Was Eaten: 6 Ways Cultures Have Explained Eclipses

isotope: Related Content

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Photos and Videos

phase diagrams of helium-3 and helium-4

What are isotopes and how do they work?

Using radioisotopes for medical diagnosis and treatment

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Topics

tantalum-181 tantalum-180 deuterium radioactive isotope tritium protium polonium-210 cosmogenic isotope stable isotope isotope effect nonmetal ion metalloid subatomic particle rare-earth element radioactivity atomism transition metal periodic table hydrogen

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Key People

Francis William Aston.

Francis William Aston

British physicist and chemist

Frederick Soddy

British chemist

Theodore William Richards

American chemist

Quiz

Periodic Table of the elements concept image (chemistry)

Facts You Should Know: The Periodic Table Quiz