Technetium is a Transition Metals element with the symbol Tc and atomic number 43. Located in period 5, group 7 (d-block), it has an atomic weight of 98 u and is classified as a synthetic at standard temperature and pressure. First identified in 1937 by Emilio Segre in Italy. Technetium has an electron configuration of [Kr] 4d⁵ 5s² with 5 electron shells containing 2, 8, 18, 13, 2 electrons respectively. It is commonly used in: medical imaging, corrosion inhibitor.

锝是一种过渡金属元素,符号为Tc,原子序数为43。位于第5周期,第7族(d区),原子量为98 u,在标准温度和压力下为人造元素。于1937 年首次被确认,由Emilio Segre发现。锝的电子排布为[Kr] 4d⁵ 5s²,具有5个电子层,分别含有2、8、18、13、2个电子。常见用途包括:医学成像,缓蚀剂。

Basic Properties基本属性

Atomic Number原子序数
43
Atomic Weight原子量
98 u
Category分类
Transition Metals过渡金属
State at STP标准状态
Synthetic人造元素
Period周期
5
Group
7
Block
d-blockd区

Physical Properties物理性质

Melting Point熔点
+2157°C
Boiling Point沸点
+4265°C
Density密度
11.50 g/cm³
Crystal Structure晶体结构
Hexagonal Close-Packed (HCP)六方密堆积
Atomic Radius原子半径
183 pm
Ionic Radius离子半径
56 pm
Electronegativity电负性
1.9

Electron Configuration电子排布

Config电子构型
[Kr] 4d⁵ 5s²
Shells电子层
2, 8, 18, 13, 2
Oxidation States氧化态
+4, +7

Electron Shells电子层结构

2e⁻
8e⁻
18e⁻
13e⁻
2e⁻

Discovery发现历史

Year年份
19371937 年
Discoverer发现者
Emilio Segre
Country国家
Italy意大利

Uses & Applications用途

Medical imaging, corrosion inhibitor

医学成像,缓蚀剂

Common Compounds常见化合物

Room Temperature常温特性

silvery gray

银灰色

Did You Know? 你知道吗?

The name Technetium comes from Tc and it was first identified in 1937.

锝的名称来源于其符号Tc,于1937年首次被确认。

Memory Aid记忆口诀

First artificially made element

第一个人造元素

Appearance外观

silvery gray

银灰色

Safety Information安全须知

  • Handle with standard laboratory precautions. Refer to the Safety Data Sheet (SDS) for detailed handling instructions.
  • 按照标准实验室预防措施处理。详细操作说明请参阅安全数据表(SDS)。

Related Elements (Same Group 7)相关元素(同第7族)

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Compare Elements元素对比

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