tantalum$81646$ - meaning and definition. What is tantalum$81646$
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What (who) is tantalum$81646$ - definition

Tantalum-155; Tantalum-156; Tantalum-157; Tantalum-158; Tantalum-159; Tantalum-160; Tantalum-161; Tantalum-162; Tantalum-163; Tantalum-164; Tantalum-165; Tantalum-166; Tantalum-167; Tantalum-168; Tantalum-169; Tantalum-170; Tantalum-171; Tantalum-172; Tantalum-173; Tantalum-174; Tantalum-175; Tantalum-176; Tantalum-177; Tantalum-178; Tantalum-179; Tantalum-180; Tantalum-181; Tantalum-182; Tantalum-183; Tantalum-184; Tantalum-185; Tantalum-186; Tantalum-187; Tantalum-188; Tantalum-189; Tantalum-190; Tantalum-180m; Ta-180m; Rarest isotope; Ta-181; Tantalum isotopes; Tantalum isotope

Tantalum         
  • Ta(CH<sub>3</sub>)<sub>5</sub>.
  • Tantalum electrolytic capacitor
  • Bimetallic]] coins minted by the Bank of [[Kazakhstan]] with silver ring and tantalum center. These two feature the [[Apollo–Soyuz]] and the [[International Space Station]]
  • Pilbara district]], Australia
  • website=minerals.usgs.gov}}</ref>
  • alt=Grey and white world map with Canada, Brazil and Mozambique colored blue representing less than 20% of the tantalum world production each and Australia colored in green representing 60% of tantalum world production
  • alt=Grey and white world map with China, Australia, Brazil and Kongo colored blue representing less than 10% of the tantalum world production each and Rwanda colored in green representing 60% of tantalum world production
CHEMICAL ELEMENT WITH THE ATOMIC NUMBER OF 73
Tantalium; Element 73; Tantalic; Ta (element); Tantalum compounds; Tantalum compound; Compounds of tantalum; History of tantalum
Tantalum is a chemical element with the symbol Ta and atomic number 73. Previously known as tantalium, it is named after Tantalus, a villain from Greek mythology.
Tantalic         
  • Ta(CH<sub>3</sub>)<sub>5</sub>.
  • Tantalum electrolytic capacitor
  • Bimetallic]] coins minted by the Bank of [[Kazakhstan]] with silver ring and tantalum center. These two feature the [[Apollo–Soyuz]] and the [[International Space Station]]
  • Pilbara district]], Australia
  • website=minerals.usgs.gov}}</ref>
  • alt=Grey and white world map with Canada, Brazil and Mozambique colored blue representing less than 20% of the tantalum world production each and Australia colored in green representing 60% of tantalum world production
  • alt=Grey and white world map with China, Australia, Brazil and Kongo colored blue representing less than 10% of the tantalum world production each and Rwanda colored in green representing 60% of tantalum world production
CHEMICAL ELEMENT WITH THE ATOMIC NUMBER OF 73
Tantalium; Element 73; Tantalic; Ta (element); Tantalum compounds; Tantalum compound; Compounds of tantalum; History of tantalum
·adj Of or pertaining to tantalum; derived from, or containing, tantalum; specifically, designating any one of a series of acids analogous to nitric acid and the polyacid compounds of phosphorus.
tantalum         
  • Ta(CH<sub>3</sub>)<sub>5</sub>.
  • Tantalum electrolytic capacitor
  • Bimetallic]] coins minted by the Bank of [[Kazakhstan]] with silver ring and tantalum center. These two feature the [[Apollo–Soyuz]] and the [[International Space Station]]
  • Pilbara district]], Australia
  • website=minerals.usgs.gov}}</ref>
  • alt=Grey and white world map with Canada, Brazil and Mozambique colored blue representing less than 20% of the tantalum world production each and Australia colored in green representing 60% of tantalum world production
  • alt=Grey and white world map with China, Australia, Brazil and Kongo colored blue representing less than 10% of the tantalum world production each and Rwanda colored in green representing 60% of tantalum world production
CHEMICAL ELEMENT WITH THE ATOMIC NUMBER OF 73
Tantalium; Element 73; Tantalic; Ta (element); Tantalum compounds; Tantalum compound; Compounds of tantalum; History of tantalum
n.
(Min.) [Called also Tantalium.] Columbian.

Wikipedia

Isotopes of tantalum

Natural tantalum (73Ta) consists of two stable isotopes: 181Ta (99.988%) and 180m
Ta
(0.012%).

There are also 35 known artificial radioisotopes, the longest-lived of which are 179Ta with a half-life of 1.82 years, 182Ta with a half-life of 114.43 days, 183Ta with a half-life of 5.1 days, and 177Ta with a half-life of 56.56 hours. All other isotopes have half-lives under a day, most under an hour. There are also numerous isomers, the most stable of which (other than 180mTa) is 178m1Ta with a half-life of 2.36 hours. All isotopes and nuclear isomers of tantalum are either radioactive or observationally stable, meaning that they are predicted to be radioactive but no actual decay has been observed.

Tantalum has been proposed as a "salting" material for nuclear weapons (cobalt is another, better-known salting material). A jacket of 181Ta, irradiated by the intense high-energy neutron flux from an exploding thermonuclear weapon, would transmute into the radioactive isotope 182
Ta
with a half-life of 114.43 days and produce approximately 1.12 MeV of gamma radiation, significantly increasing the radioactivity of the weapon's fallout for several months. Such a weapon is not known to have ever been built, tested, or used. While the conversion factor from absorbed dose (measured in Grays) to effective dose (measured in Sievert) for gamma rays is 1 while it is 50 for alpha radiation (i.e., a gamma dose of 1 Gray is equivalent to 1 Sievert whereas an alpha dose of 1 Gray is equivalent to 50 Sievert), gamma rays are only attenuated by shielding, not stopped. As such, alpha particles require incorporation to have an effect while gamma rays can have an effect via mere proximity. In military terms, this allows a gamma ray weapon to deny an area to either side as long as the dose is high enough, whereas radioactive contamination by alpha emitters which do not release significant amounts of gamma rays can be counteracted by ensuring the material is not incorporated.