Atoms of the same element are identical. The atoms of the one element are different from those of any other element. 3. Atoms of different elements can physically mix together or can chemically combine in simple whole-number ratios to form compounds.
iridium (symbol Ir) Silver-white, metallic element discovered in 1804 by the English chemist Smithson Tennant. A platinum-type metal, iridium is hard and brittle and the most corrosion-resistant metal. very rare element (0.0001 ppm of Earth 's crust), iridium is found in the naturally occurring alloys osmiridium (approximately 50% iridium) and iridiosmium (approximately 70% iridium) in Alaska and South Africa. It is obtained by igniting ammonium chloroiridate, (NH 4) 3 IrCl 6, in hydrogen atmosphere.
Who Discovered Rubidium. 02 Mar, 2012 Who discovered 0. Rubidium is a very soft, and highly reactive, silvery white metal. It is a chemical element with an atomic mass of 85.4678 and is represented by the chemical symbol Rb and the atomic number 37. It is the 23rd most common element in the crust of the Earth, but it is not widely mined because it has limited uses.