Molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance. Learn more about the properties and structures of molecules in this article.
Covalent Molecules and Compounds Just as an atom is the simplest unit that has the fundamental chemical properties of an element, a molecule is the simplest unit that has the fundamental chemical properties of a covalent compound. Some pure elements exist as covalent molecules. Hydrogen, nitrogen, oxygen, and the halogens occur naturally as the diatomic (“two atoms”) molecules H 2, N 2, O ...
A molecule is the smallest entity of a pure compound that retains its characteristic chemical properties, and consequently has constant mass and atomic composition. It is an assembly of nonmetallic atoms held together into specific shapes by covalent bonds . As much as a car is a single unit made up of many parts, a molecule is a unit made up of atoms bonded around each other in certain fixed ...
Yahoo: Strange 'Half-Mӧbius' molecule has rare properties chemists have never seen before
A molecule may be homonuclear, that is, it consists of atoms of one chemical element, e.g. two atoms in the oxygen molecule (O 2); or it may be heteronuclear, a chemical compound composed of more than one element, e.g. water (two hydrogen atoms and one oxygen atom; H 2 O).
Get the definition of a molecule. See examples of molecules and learn the different between a molecule and a compound.
How are molecules formed? What are they made of? Discover these answers and more in this explanation about molecules, their bonds, and their interactions.