鎝

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

原子序數為43的化學元素

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 · 中文

鍀（英語：Technetium；中國大陸译为锝、港澳为鍀【拼音：dé，注音：ㄉㄜˊ】，台灣译为鎝/𨱏【拼音：tǎ，注音：ㄊㄚˇ】），是一種化學元素，其化學符號为Tc，原子序數为43，原子量為97.99 u。锝的所有同位素都不穩定，是原子序最小的放射性元素。其壽命最長的同位素是锝-98，半衰期420萬年，遠短於地球的年齡，因此所有的锝元素，也就是在地球形成時可能存在的鎝，至今都已全部衰變殆盡。地球上現存的大部分锝都是人工合成的，自然界中僅有極少量存在。在鈾礦中，鍀是一種自發裂變產物；在鉬礦石中，鉬經中子俘獲后可以生成鍀。鍀是一種銀灰色的金屬晶體，其化學性質介於同族的錳和錸之間。在鍀發現以前，德米特里·門捷列夫就已經預測了它的許多性質。在他的周期表中，門捷列夫把這種尚未發現的元素叫做“類錳”，符號為Em。1937年，鍀成為第一個由人工合成而發現的元素。它的英文名來自希腊語τεχνητός，意為“人造”。鍀的短壽命同位素鍀-99m具有γ放射性，廣泛用於核醫學。僅具有β放射性。商業上，鍀的長壽命同位素是反應堆中鈾-235裂變的副產物，可以從乏燃料中提取得到。鍀最長壽命的同位素是（半衰期為420萬年）。1952年，有人在壽命超過十億年的紅巨星中發現了鍀-98，讓人們認識到恆星可以製造重元素。

Abstract from DBpedia / Wikipedia · CC BY-SA