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What (who) is isotope - definition
isotope
![In the bottom right corner of [[J. J. Thomson]]'s photographic plate are the separate impact marks for the two isotopes of [[neon]]: neon-20 and neon-22.](https://commons.wikimedia.org/wiki/Special:FilePath/Discovery of neon isotopes.JPG?width=200 "In the bottom right corner of [[J. J. Thomson]]'s photographic plate are the separate impact marks for the two isotopes of [[neon]]: neon-20 and neon-22.")
![protium]] (<sup>1</sup>H) with zero neutrons, [[deuterium]] (<sup>2</sup>H) with one neutron, and [[tritium]] (<sup>3</sup>H) with two neutrons.](https://commons.wikimedia.org/wiki/Special:FilePath/Hydrogen Deuterium Tritium Nuclei Schmatic-en.svg?width=200 "protium]] (<sup>1</sup>H) with zero neutrons, [[deuterium]] (<sup>2</sup>H) with one neutron, and [[tritium]] (<sup>3</sup>H) with two neutrons.")
NUCLIDES HAVING THE SAME ATOMIC NUMBER BUT DIFFERENT MASS NUMBERS
Isotopes; Nuclear notation; Isotope notation; Chemical isotope; Ice otope; Isotopic notation; AZE notation; Index to isotope pages; Nuclide notation; Isotop
n. a radioactive isotope
isotope
NUCLIDES HAVING THE SAME ATOMIC NUMBER BUT DIFFERENT MASS NUMBERS
Isotopes; Nuclear notation; Isotope notation; Chemical isotope; Ice otope; Isotopic notation; AZE notation; Index to isotope pages; Nuclide notation; Isotop
['??s?t??p]
¦ noun Chemistry each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei.
Derivatives
isotopic adjective
isotopically adverb
isotopy noun ??'s?t?pi
Origin
1913: from iso- + Gk topos 'place' (because the isotopes occupy the same place in the periodic table).
isotope
NUCLIDES HAVING THE SAME ATOMIC NUMBER BUT DIFFERENT MASS NUMBERS
Isotopes; Nuclear notation; Isotope notation; Chemical isotope; Ice otope; Isotopic notation; AZE notation; Index to isotope pages; Nuclide notation; Isotop
(isotopes)
Isotopes are atoms that have the same number of protons and electrons but different numbers of neutrons and therefore have different physical properties. (TECHNICAL)
...tritium, a radioactive isotope of hydrogen.
N-COUNT
Wikipedia
Isotope
Isotopes are two or more types of atoms that have the same atomic number (number of protons in their nuclei) and position in the periodic table (and hence belong to the same chemical element), and that differ in nucleon numbers (mass numbers) due to different numbers of neutrons in their nuclei. While all isotopes of a given element have almost the same chemical properties, they have different atomic masses and physical properties.
Examples of use of isotope
1. He was poisoned with radioactive Isotope Polonium–210.
2. Litvinenko died Nov. 23, three weeks after ingesting a rare radioactive isotope.
3. Doctors said he had been poisoned with polonium–210, a rare radioactive isotope.
4. Alexander Litvinenko died last November from a fatal dose of the radioactive isotope polonium 210.
5. Ninety–nine percent of uranium is the unexciting U–238 isotope.