Elemental Gases
The only chemical elements which are stable multi atom homonuclear molecules at standard temperature and pressure (STP), are hydrogen (H2), nitrogen (N2) and oxygen (O2); plus two halogens, fluorine (F2) and chlorine (Cl2). These gases, when grouped together with the monatomic noble gases ; which are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn) ; are called "elemental gases". Alternatively they are sometimes known as "molecular gases" to distinguish them from molecules that are also chemical compounds.
Read more about this topic: Gas
Famous quotes containing the words elemental and/or gases:
“This war no longer bears the characteristics of former inter-European conflicts. It is one of those elemental conflicts which usher in a new millennium and which shake the world once in a thousand years.”
—Adolf Hitler (1889–1945)
“The bird is not in its ounces and inches, but in its relations to Nature; and the skin or skeleton you show me, is no more a heron, than a heap of ashes or a bottle of gases into which his body has been reduced, is Dante or Washington.”
—Ralph Waldo Emerson (1803–1882)