technetium

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

Technetium is a chemical element; it has symbol Tc and atomic number 43. It is the lightest element whose isotopes are all radioactive. Technetium and promethium are the only radioactive elements whose neighbours in the sense of atomic number are both stable. All available technetium is produced as a synthetic element. Naturally occurring technetium is a spontaneous fission product in uranium ore and thorium ore (the most common source), or the product of neutron capture in molybdenum ores. This silvery gray, crystalline transition metal lies between manganese and rhenium in group 7 of th

AI overview

Technetium is a radioactive chemical element (symbol Tc) that is the lightest element where all forms are radioactive, and it must be created synthetically since it doesn't exist naturally in significant amounts. It matters because it is used in medical imaging and industrial applications, and understanding it helps scientists study radioactive elements and nuclear processes.

AI-generated from the Wikipedia summary — may 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

Mass: 97.907
Image: Technetium-sample.jpg

Show 13 more facts

element symbol: Tc
Commons category: Technetium
atomic number: 43
melting point: 2170
electronegativity: 1.9
Commons gallery: Technetium
time of discovery or invention: 1937-00-00
canonical SMILES: [Tc]
chemical formula: Tc
Unicode character: 鎝
ionic radius: 0.65
electron configuration: [Kr] 4d⁵ 5s²
oxidation state: 7

Sources (8)

via Wikidata · CC0

~32 min read

Article

29 sections

Contents

History
Early assumptions
Early misidentifications
Irreproducible results
Official discovery and later history
Characteristics
Physical properties
Chemical properties
Compounds
Pertechnetate and other derivatives
Other chalcogenide derivatives
Simple hydride and halide complexes
Coordination and organometallic complexes
Isotopes
Occurrence and production
Fission product
Fission product for commercial use
Waste disposal
Neutron activation
Particle accelerators
Applications
Nuclear medicine and biology
Industrial and chemical
Precautions and biological effect
Notes
References
Bibliography
Further reading
External links

Many of technetium's properties had been predicted by Dmitri Mendeleev before it was discovered; Mendeleev noted a gap in his periodic table and gave the undiscovered element the provisional name ekamanganese (Em). In 1937, technetium became the first predominantly artificial element to be produced, hence its name (from the Greek '''', 'artificial', +