What does isotopic mean?
Isotopic is an adjective meaning relating to isotopes: forms of an element that have the same number of protons but different numbers of neutrons. Because neutrons contribute to atomic mass without changing the element's basic chemical identity, isotopes can have different masses and nuclear properties. The term appears in scientific contexts such as isotopic composition, isotopic analysis, and isotopic labeling, where researchers distinguish the relative proportions or behavior of particular atomic forms. Isotopic variation can be useful for dating materials, tracing environmental processes, identifying sources, and studying chemical or nuclear reactions. Although the related noun isotope is more familiar, isotopic is the appropriate adjective when describing a property, comparison, or procedure involving these atomic variants.
adjectiveRelating to isotopes or to the property of having the same number of protons but different numbers of neutrons. Isotopic differences can affect physical properties, such as an element's atomic mass and nuclear behavior.
- Relating to isotopes, especially to the existence of different forms of an element with the same atomic number but different mass numbers.
- Characterized by or involving a specified isotope or isotopic composition.
"The researchers measured the isotopic composition of the ancient sample to determine its geographic origin."
"Carbon-14 is an isotopic variant of carbon used in radiocarbon dating."
"The laboratory detected an unusual isotopic signature in the mineral samples."
The atoms of an element are not all identical: isotopes share the same chemical identity but differ in the neutron count that gives them distinct masses and personalities.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does isotopic come from?
The adjective isotopic was formed in the 20th century from isotope, a term coined in the early 20th century from Greek iso, meaning equal, and topos, meaning place, in reference to elements occupying the same place in the periodic table. The suffix -ic was added to form the adjective. Related scientific terms include isotopes, isotopologues, and isotopy.
Related word forms
How isotopic is actually used
In scientific and technical writing, isotopic is standard and usually modifies composition, analysis, ratio, variation, or labeling. In general usage it is uncommon and may sound technical or unfamiliar.
Easily confused with isotopic
An isotope is a particular form of an element with a given number of neutrons, whereas isotopic is the adjective describing properties or comparisons involving isotopes.