one of the forms of a chemical element that have the same atomic number because they have the same number of protons, but have a different number of neutrons, and therefore have a different mass
Synonyms and related words
Types of chemical substance
acid
alkali
base
isotope
noun countable chemistry
US /ˈaɪsəˌtoʊp/
Other entries for this word
daughter isotopenoun
Word Forms
singular
isotope
plural
isotopes
DEFINITIONS1
1
one of the forms of a chemical element that have the same atomic number because they have the same number of protons, but have a different number of neutrons, and therefore have a different mass