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Research, Technology, Methods > chemical substances > chemical elements > isotopes

Preferred Term:

isotopes

Definition:

Different forms of a single element that have the same number of protons but different numbers of neutrons in their nuclei. Some radioactive isotopes are unstable and shed nuclear particles over time until they become stable. For instance, unstable isotopes of uranium break down to become lead.

Concept Schemes:

NALT Full
NALT Core

Broader Concept:

chemical elements

Narrower Concepts:

tritiated water
carbon isotopes
oxygen isotopes
stable isotopes

URI:

https://lod.nal.usda.gov/nalt/267

Download this Concept:

RDF/XMLCreated 2006-01-19, last modified 2019-09-03

Exactly Matching Concepts:

http://id.loc.gov/authorities/subjects/sh00006433
http://id.cabi.org/cabt/62087
http://id.agrisemantics.org/gacs/C2391
http://id.loc.gov/authorities/subjects/sh85068681
http://aims.fao.org/aos/agrovoc/c_11852