77 Ir Iridium 192.22 u

Iridium

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周期
6
族
9
区块
d-区块
相态 (STP)
Solid

Iridium is the most corrosion-resistant metal known. It is used in spark plugs, crucibles, and the international prototype kilogram.

About Iridium

Iridium (Ir) is the most corrosion-resistant metal known, resisting acids and remaining stable at high temperatures. Element 77 occupies group 9 of period 6 in the d-block, with an atomic mass of 192.22, the electron configuration [Xe] 4f¹⁴ 5d⁷ 6s², and a Pauling electronegativity of 2.2. This durability suits it to hard-wearing applications such as long-life spark-plug electrodes and crucibles for growing high-purity crystals. Iridium historically defined the standard for permanence: the international prototype kilogram was a platinum-iridium alloy. A dense, hard, silvery member of the platinum group, it is solid at standard conditions.

物理属性

原子质量 192.22 u
STP相态 Solid

电子属性

电负性 2.2

电子构型

构型 [Xe] 4f¹⁴ 5d⁷ 6s²

Electron Shell Configuration

Iridium electron shell configuration Ir 2e⁻ 8e⁻ 18e⁻ 32e⁻ 15e⁻ 2e⁻
Electron shell structure of Iridium — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 32
5 (O) 15
6 (P) 2

Position in Periodic Table

Iridium position in the periodic table Ir

区块与周期

区块

s p d f

周期

1 2 3 4 5 6 7

元素周期表

镧系元素 锕系元素

更多过渡金属

21 Sc Scandium 22 Ti Titanium 23 V Vanadium 24 Cr Chromium 25 Mn Manganese 26 Fe Iron 27 Co Cobalt 28 Ni Nickel 29 Cu Copper 30 Zn Zinc

Frequently Asked Questions

What is Iridium?
Iridium (Ir) is a chemical element with atomic number 77. It is a solid at standard temperature and pressure, classified as a 过渡金属.
What are the key properties of Iridium?
Iridium has an atomic mass of 192.22 u.
What is the electron configuration of Iridium?
The electron configuration of Iridium is [Xe] 4f14 5d7 6s2. It is in the d-block of the periodic table.
What is the electronegativity of Iridium?
Iridium has an electronegativity of 2.2 on the Pauling scale.