Iridium Element in Periodic Table | Atomic Number Atomic Mass

Iridium Element:

The chemical element iridium is classed as a very hard, brittle, silvery-white transition metal. It is a one of the members in Platinum group metals along with platinum, palladium, rhodium, osmium and ruthenium. Its atomic number is 77 and indicated by the symbol Ir. In the Periodic table it is a d-block metal and it  belongs to the 9th group and 6th period. Iridium is one of the rarest elements on earth. It is found in nature as sediments that were deposited by rivers.  Iridium has two naturally occurring, stable isotopes, ¹⁹¹Ir and ¹⁹³Ir. Additionally, 34 radioisotopes have also been synthesized.

Uses Of Iridium Element:

• Iridium is used in special alloys and forms an alloy with osmium, which is used for pen tips and compass bearings.
• It was used in making the standard metre bar, which is an alloy of 90% platinum and 10% iridium.
• Because of its high melting point and low reactivity it is also used for the contacts in spark plugs

Iridium Element Information:

Discovery year:1803

Discovered by:Smithson Tennant 

Atomic number: 77

Relative atomic mass: 192.217

Electron configuration: [Xe] 4f¹⁴ 5d⁷ 6s²     

Block: d-block 

Other elements in the same block:

Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Yttrium, Zirconium, Niobium, Molybdenum, Technetium, Ruthenium, Rhodium, Palladium, Silver, Cadmium, Lanthanum,  Hafnium, Tantalum, Tungsten, Rhenium, Osmium, Platinum, Gold, Mercury, Actinium, Rutherfordium, Dubnium, Seaborgium, Bohrium, Hassium, Meitnerium, Darmstadtium, Roentgenium and  Copernicium are the elements in the same block.

Period: period 6 

Other elements in the same period:

Caesium, Barium, Lanthanum,  Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Hafnium, Tantalum, Tungsten, Rhenium, Osmium, Platinum, Gold, Mercury, Thallium, Lead, Bismuth, Polonium, Astatine and Radon

Group: group 9

Other elements in the same group:

Cobalt, Rhodium and Meitnerium are the same group elements.

Other elements in the same orbital:

Hafnium, Tantalum, Tungsten, Rhenium, Osmium, Platinum, Gold and  Mercury are the elements in the same orbital.

Allotropes: none

Key isotopes: ¹⁹³Ir 

Melting point: 2446°C, 4435°F, 2719 K 

Boiling point: 4428°C, 8002°F, 4701 K 

Element category:  transition metal

Density (g cm⁻³): 22.5622

CAS number: 7439-88-5 

Color: silvery white

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Hydrogen, Helium, LithiumBeryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine,  Neon , Sodium, Magnesium, Aluminium, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Potassium, Calcium, Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Gallium, Germanium, Arsenic, Selenium, Bromine, Krypton,  Rubidium, Strontium, Yttrium, Zirconium, Niobium, Molybdenum, Technetium, Ruthenium, Rhodium, Palladium, Silver, Cadmium, Indium, Tin, Antimony, Tellurium, Iodine, Xenon,  Caesium, Barium, Lanthanum,  Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Hafnium, Tantalum, Tungsten, Rhenium, Osmium, Iridium, Platinum, Gold, Mercury, Thallium, Lead, Bismuth, Polonium, Astatine, Radon,  Francium, Radium, Actinium, Thorium, Protactinium, Uranium, Neptunium, Plutonium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium, Lawrencium, Rutherfordium, Dubnium, Seaborgium, Bohrium, Hassium, Meitnerium, Darmstadtium, Roentgenium, Copernicium, Nihonium, Flerovium, Moscovium, Livermorium, Tennessine, Oganesson.