Iridium is a metallic element that is both hard and brittle. Described as whitish-yellow or silvery in color, it just a little less dense than osmium, which is the densest element-22.560 gm/cm3 compared to 22.6 gm/cm3 .
Iridium was discovered by Smithson Tennant, an English chemist, in London, England in 1803, and it's name comes from the Latin for iris, the goddess of the rainbow on account of its colored salts. Tennant was also he discoverer of osmium.
It is found in gravel deposits, and believed to occur only in alloys with other noble metals, i.e., not in an uncombined state. Often it is found alloyed with osmium in compounds called osmiridium and iridiosmium, the origin of the names being obvious. It is, however, extremely scarce, occurring in only .001 ppm in the Earth's crust.
Iridium has a number of uses. It is used to harden platinum, combined with osmium in creating gold-tip pens, and to make highly specialized crucibles. It iridium can be involved in cancer irradiation, as well as the making of hypodermic syringes and surgical pins. Other uses include spark plugs for helicopters, pivot bearings, and extrusion dies.
One very special use of iridium is its role in the weights and measures standard for the kilogram, which is made of an alloy of iridium (10%) and platinum (90%). On account of exceptionally high amounts of iridium in rocks dating to between the Cretaceous period and the Tertiary period, t is speculated by some that iridium was a component of an asteroid that struck the Earth and led to the extinction of the dinosaurs
Indium is a solid.
Iridium is a metal. It belongs to d-block elements.
Iridium belongs to the Transitional Metal family.
iridium is a family member of the platinum group it is also known as a transition metal.
A transition metal or radioactive material.
Iridium, indium are two
Iridium is a nonmetal.
Because platinum is non reactive metal
Iridium's position on the periodic table indicates that it is a metal.
Iridium is a metal. It belongs to d-block elements.
Iridium is not an explosive metal.
Iridium belongs to the Transitional Metal family.
Iridium is a transition metal and is used for the tips of fountain pens.
Iridium is a solid, a metal at normal temperatures. It melts at 2466 0C
Iridium is a metallic element, and Platinum is a different metallic element.
Iridium is a metal element. Atomic number of it is 77.
You cannot. Iridium is a very rare and expensive metal. You could not afford a lightning arrester made of iridium.
I think it is Iridium :)