Definitions for technetium
tɛkˈni ʃi əm, -ʃəmtech·netium

Princeton's WordNetRate this definition:0.0 / 0 votes

1. technetium, Tc, atomic number 43noun

   a crystalline metallic element not found in nature; occurs as one of the fission products of uranium

WiktionaryRate this definition:0.0 / 0 votes

1. technetiumnoun

   a metallic chemical element (symbol Tc) with an atomic number of 43.

2. Etymology: techno- + -ium, because it was the first artificially created element.

ChatGPTRate this definition:0.0 / 0 votes

1. technetium

   Technetium is a chemical element with the symbol Tc and atomic number 43. It is a silver-gray, crystalline, radioactive metal that is used in diagnostic procedures in nuclear medicine. Technetium is the lightest element whose isotopes are all radioactive, with none being stable. It was the first element to be artificially produced, hence its name from the Greek word "Technetos", meaning artificial.

WikidataRate this definition:0.0 / 0 votes

1. Technetium

   Technetium is the chemical element with atomic number 43 and symbol Tc. It is the lowest atomic number element without any stable isotopes; every form of it is radioactive. Nearly all technetium is produced synthetically, and only minute amounts are found in nature. Naturally occurring technetium occurs as a spontaneous fission product in uranium ore or by neutron capture in molybdenum ores. The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. Many of technetium's properties were predicted by Dmitri Mendeleev before the element was discovered. Mendeleev noted a gap in his periodic table and gave the undiscovered element the provisional name ekamanganese. In 1937, technetium became the first predominantly artificial element to be produced, hence its name. Its short-lived gamma ray-emitting nuclear isomer—technetium-99m—is used in nuclear medicine for a wide variety of diagnostic tests. Technetium-99 is used as a gamma ray-free source of beta particles. Long-lived technetium isotopes produced commercially are by-products of fission of uranium-235 in nuclear reactors and are extracted from nuclear fuel rods. Because no isotope of technetium has a half-life longer than 4.2 million years, its detection in 1952 in red giants, which are billions of years old, helped bolster the theory that stars can produce heavier elements.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Technetium

   The first artificially produced element and a radioactive fission product of URANIUM. Technetium has the atomic symbol Tc, atomic number 43, and atomic weight 98.91. All technetium isotopes are radioactive. Technetium 99m (m=metastable) which is the decay product of Molybdenum 99, has a half-life of about 6 hours and is used diagnostically as a radioactive imaging agent. Technetium 99 which is a decay product of technetium 99m, has a half-life of 210,000 years.

Matched Categories

1. • Metallic Element

How to pronounce technetium?

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Numerology

1. Chaldean Numerology

   The numerical value of technetium in Chaldean Numerology is: 6

2. Pythagorean Numerology

   The numerical value of technetium in Pythagorean Numerology is: 1

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=technetium
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Technetium
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=technetium