Iridium element (Ir) is in group 9 and period 6 of a periodic table. Iridium is in the d-block and it is classified as a transition element on the periodic table.
There is a lot more information related to iridium which is mentioned in the Information Table given below.
So let’s dive right into it!
Table of contents
- Iridium element (Information Table)
- Iridium element in Periodic table
- Facts about Iridium
- Properties of Iridium
- Uses of Iridium
Iridium Element (Information Table)
The important data related to iridium element is given in the table below.
|Appearance of iridium||Silvery white metallic surface|
|Atomic number of iridium||77|
|Symbol of iridium||Ir|
|Atomic mass of iridium||192.22 u|
|Protons, Neutrons & Electrons in iridium||Protons: 77, Neutrons: 115, Electrons: 77|
|State of iridium (at STP)||Solid|
|Group number of iridium in periodic table||9|
|Period number of iridium in periodic table||6|
|Block of iridium in periodic table||d-block|
|Category of iridium||Transition metals|
|Bohr model or Electrons per shell or Electrons arrangement in iridium||2, 8, 18, 32, 15, 2|
|Electron configuration of iridium||[Xe] 4f14 5d7 6s2|
|Orbital diagram of iridium|
|Electronegativity of iridium (on pauling scale)||2.2|
|Atomic radius of iridium (van der Waals radius)||202 picometers|
|Density of iridium||22.56 g/cm3|
|1st ionization energy of iridium||9.1 eV|
|Main isotope of iridium||193Ir|
|Melting point of iridium||2719 K or 2446 °C or 4435 °F|
|Boiling point of iridium||4403 K or 4130 °C or 7466 °F|
|Crystal structure of iridium||Face Centered Cubic (FCC)|
|Discovery of iridium||By Smithson Tennant in 1803|
Also see: Interactive Periodic Table (It has rotating bohr models as well as many other details of all the 118 elements in a single periodic table).
Iridium element in Periodic table
The Iridium element (Ir) has the atomic number 77 and is located in group 9 and period 6. Iridium is a metal and it is classified as a transition element.
Facts about iridium
Here are a few interesting facts about the iridium element.
- Smithson Tennant was the chemist who discovered the iridium element in the year 1803.
- Iridium was given its name from the Latin word “Iris”, meaning rainbow.
- Iridium is the 2nd most dense element after osmium.
- Machining of iridium metal is very difficult as it is very hard.
- The concentration of iridium in the earth’s crust is only 0.4 parts per billion, which is very rare.
Properties of iridium
Here is a list of some physical properties and chemical properties of iridium.
Physical properties of iridium
- Iridium has a silvery white metallic appearance.
- Iridium has FCC crystal structure.
- Iridium has many isotopes, and the most abundant isotope is 193Ir.
- Iridium has a density of 22.56 g/cm3 and its atomic mass is 192.22 amu.
- The melting point and boiling point of iridium is 2719 K and 4403 K respectively.
Chemical properties of iridium
- Iridium is unreactive to most of the acids.
- Iridium reacts with the atmospheric oxygen at higher temperatures.
- Iridium reacts with sulfur to give iridium disulfide.
- Iridium reacts with salts like NaCl and NaCN.
Uses of iridium
Here are some uses of the iridium element.
- Iridium is mostly used as an alloying element with other metals to make them hard.
- Iridium is also used in crucible furnaces because it can resist high temperatures..
- Iridium is also used in making electrical contacts as well as fountain pen tips.
- The platinum-iridium alloy was used to make the international standard kilogram weight. (it contains 10% iridium and 90% platinum).
- Iridium is also used in crucible furnaces because it can resist high temperatures.