Soddy Frederick

Sod·dy

 (sŏd′ē), Frederick 1877-1956.
British chemist. He won a 1921 Nobel Prize for investigations into the origin and nature of isotopes.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Sod·dy

(sŏd′ē), Frederick 1877-1956.
British chemist who was a pioneer in the study of radioactivity. With Ernest Rutherford, he explained the atomic disintegration of radioactive elements. Soddy also coined the word isotope to describe elements that were chemically identical but had different atomic weights.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.