Cr
Chromium is a Transition Metals element with the symbol Cr and atomic number 24. Located in period 4, group 6 (d-block), it has an atomic weight of 51.996 u and is classified as a solid at standard temperature and pressure. First identified in 1797 by Louis Nicolas Vauquelin in France. Chromium has an electron configuration of [Ar] 3d⁵ 4s¹ with 4 electron shells containing 2, 8, 13, 1 electrons respectively. It is commonly used in: stainless steel, chrome plating, dyes, emeralds.
铬是一种过渡金属元素,符号为Cr,原子序数为24。位于第4周期,第6族(d区),原子量为51.996 u,在标准温度和压力下为固体。于1797 年首次被确认,由Louis Nicolas Vauquelin发现。铬的电子排布为[Ar] 3d⁵ 4s¹,具有4个电子层,分别含有2、8、13、1个电子。常见用途包括:不锈钢,镀铬,染料,祖母绿。
Basic Properties基本属性
- Atomic Number原子序数
- 24
- Atomic Weight原子量
- 51.996 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
- 6
- Block区
- d-blockd区
Physical Properties物理性质
- Melting Point熔点
- +1907°C
- Boiling Point沸点
- +2671°C
- Density密度
- 7.19 g/cm³
- Crystal Structure晶体结构
- Body-Centered Cubic (BCC)体心立方
- Atomic Radius原子半径
- 166 pm
- Ionic Radius离子半径
- 62 pm
- Electronegativity电负性
- 1.66
Electron Configuration电子排布
- Config电子构型
- [Ar] 3d⁵ 4s¹
- Shells电子层
- 2, 8, 13, 1
- Oxidation States氧化态
- +2, +3, +6
Electron Shells电子层结构
Discovery发现历史
- Year年份
- 17971797 年
- Discoverer发现者
- Louis Nicolas Vauquelin
- Country国家
- France法国
Uses & Applications用途
Stainless steel, chrome plating, dyes, emeralds
不锈钢,镀铬,染料,祖母绿
Common Compounds常见化合物
—
—
Room Temperature常温特性
silvery metallic
银色金属光泽
Did You Know? 你知道吗?
The name Chromium comes from Cr and it was first identified in 1797.
铬的名称来源于其符号Cr,于1797年首次被确认。
Memory Aid记忆口诀
Chrome shines bright
不锈钢因铬而不锈
Appearance外观
silvery metallic
银色金属光泽
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)。