Os is the symbol for Osmium, a transition metal. It is an element.
Osmium tetroxide
The chemical compound name for OsCl4 is Osmium tetrachloride.
Osmium is a dense, bluish-silver metal that is part of the platinum group of elements. Objects made from osmium, such as specialized instruments, fountain pen nibs, and electrical contacts, leverage its hardness and resistance to wear. Due to its rarity and high density, osmium is often used in applications where durability and precision are crucial. However, it can also form osmium tetroxide, a toxic compound, so handling osmium requires caution.
Osmium is a chemical element that has the symbol Os and atomic number 76. So it is made of itself.Individual atoms are, as usual made up of protons, neutrons and electrons. The protons and neutrons are made up of quarks.That aside, see the first paragraph in this answer.
Osmium is a metal
Osmium tetroxide
The chemical compound name for OsCl4 is Osmium tetrachloride.
Element.
Osmium chlorite
From Greek osmē, smell (from the strong odor of osmium tetroxide).Named osmium after http://www.answers.com/topic/greek-language osme meaning "a smell", because of the smell of the volatile osmium tetroxide
Osmium itself is not flammable, but osmium tetroxide, a compound of osmium, is highly reactive and can ignite in air. Osmium metal is very inert and has a high melting point, making it not prone to catching fire under normal conditions.
Osmium tetroxide is the chemical compound with the formula OsO4.
The compound with the formula OsO4 is called osmium tetroxide. It is a highly toxic and volatile chemical commonly used in organic synthesis and as a staining agent in microscopy.
Mono oxygen mono sulfide
The covalent compound name for OS is osmium sulfide.
Osmium is element 76, one of the "Platinum Group Metals".
The chemical formula for Osmium tetroxide is OsO4. It is a highly toxic and volatile compound used in organic synthesis and electron microscopy.