isotope

CEFRB2

/ˈaɪ.sə.təʊp/

noun

Türkçe translations

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In plain English

  1. 01

    noun

    One of two or more atoms with the same atomic number but with different numbers of neutrons.

  2. 02

    noun

    Extra detail

    To define or demonstrate an isotopy of (one map with another).

Examples

  • The principal natural isotope of aluminium is aluminium-27.

At a glance

Sits at B2 on the CEFR scale

Senses
3
Parts of speech
1

Also pronounced

  • /ˈaɪ.sə.toʊp/

Deep Dive

noun

Extra meaning

  1. 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.

Quick test

Two questions on this entry. Nothing is scored.

Question 1 · Quick check

A radioactive blank like uranium-238 decays over thousands of years.

Practise this properly in the app, where the word comes back before you forget it.

Nearby

Origin

noun

From iso- (“equal”) + -tope (“place”), because the different isotopes of an element always occupy the same place in the periodic table. The term was coined by Scottish doctor Margaret Todd in 1909 and first used publicly on February 27, 1913 by English chemist Frederick Soddy.