# isotope vs isotopic

> English confusable word pair

## The two words

### isotope
*noun · IPA /ˈaɪ.sə.təʊp/ · frequency rank #23,875*
Any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei. Thus, isotopes have the same atomic number but a different mass number.

### isotopic
*adjective · frequency rank #43,723*
of, or relating to isotopes

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/isotope-vs-isotopic