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.
This is a pretty species and can be grown the same way as other oxyglossums. Dendrobium vexillarius. This is the most abundant of all the Irian Jaya species in this section and is found as an epiphyte in a wide range of habitats (up to over 10,000 ft or 3000 m), in color forms from blue to dark crimson.he first, the cool-growing species, are generally deciduous. Water and feed these during growth; then allow the orchids a decided winter rest, with either no water or just enough to keep the canes from shriveling. During their rest, they appreciate cool nights of about 40 to 50 F (4 to 10 C).