Technetium

Also known as 43Tc, Tc, element 43, masurium, panormium, eka-manganese

radioaktives chemisches Element mit dem Symbol Tc und der Ordnungszahl 43

OverviewAI-generated

Technetium is a chemical element with the symbol Tc and atomic number 43. It has an electronegativity of 1.9 and an ionic radius of 0.65. The element’s electron configuration is [Kr] 4d⁵ 5s², and it exhibits an oxidation state of 7. Its melting point is 2170.

The canonical SMILES representation is [Tc], and its chemical formula is Tc. The Unicode character for technetium is 鎝. The PubChem identifier is 23957, and the IUPAC name is technetium. The molecular weight is 96.90636, while another listed mass is 97.907. The compound has zero hydrogen bond donors and acceptors, with a topological polar surface area of 0.

Technetium was discovered in 1937. It is referenced by 732 other encyclopedia articles. PubMed records 53,611 entries related to the query technetium.

Synthesized by Vinony from 26 facts across 4 sources: Wikidata, PubChem, PubMed, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

Chemical data

Formula: Tc
Molecular weight: 96.90636 g/mol
IUPAC name: technetium
SMILES: [Tc]
InChIKey: GKLVYJBZJHMRIY-UHFFFAOYSA-N
Polar surface area: 0 Å²
H-bond donors: 0
H-bond acceptors: 0
Formal charge: 0

via PubChem

Research

53,611 papers

Technetium, the missing element.ReviewEuropean journal of nuclear medicine · 1996de Jonge FA, Pauwels EKDOI: 10.1007/BF00837634
Technetium Complexes and Radiopharmaceuticals with Scorpionate Ligands.ReviewMolecules (Basel, Switzerland) · 2018Martini P, Pasquali M, Boschi A et al.DOI: 10.3390/molecules23082039
[Technetium Tc43 99m].ReviewLa Presse medicale · 1967Pizon P
Addressing Technetium-99m Shortage.Journal of the American College of Radiology : JACR · 2017Mahesh M, Madsen MDOI: 10.1016/j.jacr.2017.02.007
Radiotracers based on technetium-94m.ReviewCurrent radiopharmaceuticals · 2011Gagnon K, McQuarrie S, Abrams D et al.DOI: 10.2174/1874471011104020090
Indocyanine green fluorescence versus blue dye, technetium-99M, and the dual-marker combination of technetium-99M + blue dye for sentinel lymph node detection in early breast cancer-meta-analysis including consistency analysis.ReviewSurgery · 2024White KP, Sinagra D, Dip F et al.DOI: 10.1016/j.surg.2023.10.021
Technetium and gallium derived radiopharmaceuticals: comparing and contrasting the chemistry of two important radiometals for the molecular imaging era.ReviewChemical reviews · 2010Bartholomä MD, Louie AS, Valliant JF et al.DOI: 10.1021/cr1000755
Straightening out the wrinkles in technetium-99m-labeled bone scintigraphy tracer assessment of cardiac amyloidosis.Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology · 2021Small GR, Ruddy TDDOI: 10.1007/s12350-019-01718-8

via PubMed

Wikidata facts

Instance of: synthetic element
Subclass of: period 5
Part of: group 7
Named after: technique
Mass: 97.907
Image: Technetium-sample.jpg

Show 19 more facts

element symbol: Tc
discoverer or inventor: Carlo Perrier
Commons category: Technetium
topic's main category: Category:Technetium
atomic number: 43
melting point: 2170
electronegativity: 1.9
Commons gallery: Technetium
location of discovery: Italy
has characteristic: radioactivity
time of discovery or invention: 1937-00-00
canonical SMILES: [Tc]
chemical formula: Tc
Unicode character: 鎝
different from: Microsoft TechNet
ionic radius: 0.65
electron configuration: [Kr] 4d⁵ 5s²
oxidation state: 7
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4

Sources (8)

via Wikidata · CC0

Article · Deutsch

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. Technetium war das erste künstlich hergestellte Element und erhielt deswegen seinen aus dem altgriechischen Wort τεχνητός technētós („künstlich“, Ableitung von τέχνη téchne) hergeleiteten Namen. Es zählt zu den Übergangsmetallen, im Periodensystem steht es in der 5. Periode und der 7. Nebengruppe (Gruppe 7) oder Mangangruppe. Alle Technetium-Isotope sind radioaktiv, das heißt, sämtliche Atomkerne, die 43 Protonen enthalten, sind instabil und zerfallen. Technetium und das schwerere Promethium (61) sind die einzigen Elemente mit kleinerer Ordnungszahl als Bismut (83), die diese Eigenschaft besitzen.

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