Co
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族
- 9
- Block区
- 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
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)。