Cobalt is a Transition Metals element with the symbol Co and atomic number 27. Located in period 4, group 9 (d-block), it has an atomic weight of 58.933 u and is classified as a solid at standard temperature and pressure. First identified in 1735 by Georg Brandt in Sweden. Cobalt has an electron configuration of [Ar] 3d⁷ 4s² with 4 electron shells containing 2, 8, 15, 2 electrons respectively. It is commonly used in: batteries, superalloys, magnets, vitamin b12.

钴是一种过渡金属元素,符号为Co,原子序数为27。位于第4周期,第9族(d区),原子量为58.933 u,在标准温度和压力下为固体。于1735 年首次被确认,由Georg Brandt发现。钴的电子排布为[Ar] 3d⁷ 4s²,具有4个电子层,分别含有2、8、15、2个电子。常见用途包括:电池,高温合金,磁铁,维生素B12。

Basic Properties基本属性

Atomic Number原子序数
27
Atomic Weight原子量
58.933 u
Category分类
Transition Metals过渡金属
State at STP标准状态
Solid固体
Period周期
4
Group
9
Block
d-blockd区

Physical Properties物理性质

Melting Point熔点
+1495°C
Boiling Point沸点
+2927°C
Density密度
8.90 g/cm³
Crystal Structure晶体结构
Hexagonal Close-Packed (HCP)六方密堆积
Atomic Radius原子半径
152 pm
Ionic Radius离子半径
65 pm
Electronegativity电负性
1.88

Electron Configuration电子排布

Config电子构型
[Ar] 3d⁷ 4s²
Shells电子层
2, 8, 15, 2
Oxidation States氧化态
+2, +3

Electron Shells电子层结构

2e⁻
8e⁻
15e⁻
2e⁻

Discovery发现历史

Year年份
17351735 年
Discoverer发现者
Georg Brandt
Country国家
Sweden瑞典

Uses & Applications用途

Batteries, superalloys, magnets, vitamin B12

电池,高温合金,磁铁,维生素B12

Common Compounds常见化合物

Room Temperature常温特性

bluish-gray

蓝灰色

Did You Know? 你知道吗?

The name Cobalt comes from Co and it was first identified in 1735.

钴的名称来源于其符号Co,于1735年首次被确认。

Memory Aid记忆口诀

Blue pigment and battery metal

电池和蓝色颜料的金属

Appearance外观

bluish-gray

蓝灰色

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 9)相关元素(同第9族)

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Compare Elements元素对比

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