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See all on Wikipediahttps://en.wikipedia.org/wiki/TechnetiumTechnetium is a chemical element with the symbol Tc and atomic number 43. It is the lightest element whose isotopes are all radioactive. Nearly all available technetium is produced as a synthetic element. Naturally occurring technetium is a spontaneous fission product in uranium ore and thorium ore, the … See more
Search for element 43
From the 1860s through 1871, early forms of the periodic table proposed by Dmitri Mendeleev contained a gap between molybdenum (element 42) and ruthenium (element 44). In … See more
Technetium, with atomic number Z = 43, is the lowest-numbered element in the periodic table for which all isotopes are radioactive. The second-lightest exclusively radioactive element, promethium, has atomic number 61. Atomic nuclei with … See more
Nuclear medicine and biology
Technetium-99m ("m" indicates that this is a metastable nuclear isomer) is used in radioactive isotope medical tests. For example, … See morePhysical properties
Technetium is a silvery-gray radioactive metal with an appearance similar to platinum, commonly obtained as a gray powder. The crystal structure of the bulk pure metal is hexagonal close-packed. The crystal structure of … See morePertechnetate and derivatives
The most prevalent form of technetium that is easily accessible is sodium pertechnetate, Na[TcO4]. The majority of this material is … See moreTechnetium plays no natural biological role and is not normally found in the human body. Technetium is produced in quantity by nuclear fission, and spreads more readily than many radionuclides. It appears to have low chemical toxicity. For example, no … See more
Wikipedia text under CC-BY-SA license- https://cs.wikipedia.org/wiki/Technecium
Technecium (chemická značka Tc, latinsky Technetium) je nejlehčí prvek v periodické soustavě, který nemá žádný stabilní izotop.
Wikipedia · Text under CC-BY-SA license- Chemická skupina: Přechodné kovy
- Cizojazyčné názvy: lat. Technetium
- Název, značka, číslo: Technecium, Tc, 43
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- https://hu.wikipedia.org/wiki/Technécium
- A 43-as rendszámú elem nyomában
1861-től egészen 1871-ig a Mengyelejev által javasolt korai periódusos rendszer egy rést tartalmazott a molibdén (Z=42) és a ruténium között (Z=44). 1871-ben Mengyelejev megjósolta, hogy ez a hiányzó elem foglalhatja el a mangán alatti üres helyet, így annak hasonló kémiai tulaj… - Hivatalos felfedezése, előfordulása
A 43-as rendszámú elem létezését hivatalosan 1936 decemberében erősítette meg a Palermói Egyetem két kutatója, Carlo Perrier és Emilio Segrè. Segrè az 1930-as évek közepén a Columbia Egyetemen és a Lawrence Berkeley National Laboratory-ban tett látogatása során rávette Ernes…
- Latin megnevezés: technetium
- Elemi sorozat: átmenetifémek
- Név, vegyjel, rendszám: technécium, Tc, 43
- A 43-as rendszámú elem nyomában
- https://en.wikipedia.org/wiki/Technetium-99m
- Discovery
In 1938, Emilio Segrè and Glenn T. Seaborg isolated for the first time the metastable isotope technetium-99m, after bombarding natural molybdenum with 8 MeV deuterons in the 37-inch (940 mm) cyclotron of Ernest Orlando Lawrence's Radiation laboratory.In 1970 Seaborg explain… - Early medical applications in the United States
99mTc remained a scientific curiosity until the 1950s when Powell Richards realized the potential of technetium-99m as a medical radiotracer and promoted its use among the medical community. While Richards was in charge of the radioisotope production at the Hot Lab Division of the Brook…
- Names: technetium-99m, Tc-99m
- Symbol: ⁹⁹ᵐTc
- Neutrons (N): 56
- Discovery
- https://sk.wikipedia.org/wiki/Technécium
- Technécium je umelo pripravený prvok, ktorý sa v prírode takmer vôbec nevyskytuje. Technécium sa získava bombardovaním molybdénu neutrónmi v jadrovom reaktore. Pri tomto procese najprv vznikne nestály izotop molybdénu 99Mo, ktorý sa beta rozpadom premieňa na 99Tc. Vo fáze výskumu je príprava technécia v cyklotróne. Najstálejším izotopom technécia j...
- Atómová hmotnosť: 98 g·mol−1
- Elektrónová konfigurácia: [Kr] 4d⁵ 5s²
- Atómový polomer: 136 pm
- Mn ↑ Tc ↓ Re: 43
- https://simple.wikipedia.org/wiki/Technetium
Technetium is a radioactive chemical element that has the chemical symbol Tc and has the atomic number 43. It is the lightest synthetic element. Chemistry of Technetium [ change | …
- https://de.wikipedia.org/wiki/Technetium
Technetium ist ein chemisches Element mit dem Elementsymbol Tc und der Ordnungszahl 43. Es kommt auf der Erde natürlicherweise vor, wenn auch in sehr geringen Mengen. …
- https://sco.wikipedia.org/wiki/Technetium
Technetium is the chemical element wi atomic number 43 an seembol Tc. It is the lawest atomic number element wioot ony stable isotopes ; every fairm o it is radioactive . Nearly aw …
- https://en.wiktionary.org/wiki/technécium
Hungarian: ·technetium (chemical element)··^ Laczkó, Krisztina and Attila Mártonfi. Helyesírás (’Orthography’). Budapest: Osiris Kiadó, 2006. →ISBN
- https://da.wikipedia.org/wiki/Technetium
Technetium er et grundstof med kemisk symbol Tc og atomnummer 43 i det periodiske system. Det tilhører gruppen af overgangsmetaller. Technetium har det laveste atomnummer af alle …
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