Quantum mechanics (QM; also known as quantum physics or quantum theory) including quantum field theory, is a fundamental branch of physics concerned with processes involving, for example, atoms and photons.
Use oxide in a sentence. 1  a binary compound of oxygen with some other element or with a radical. 2  Divalent anionic oxygen, or a compound of oxygen, especially a binary compound of oxygen with a more electropositive element. Origin of oxide. French ox(ygÃ¨ne) oxygen ; see oxygen . (ac)ide acid ( from Latin acidus tart, acid ; see acid .
Earth's crust contains a lot of oxygen, which combines with many other elements. Oxides are minerals that contain one or two metal elements combined with oxygen. Oxides are different from silicates because oxides do not contain silicon.hosphates have a tetrahedron building block that is similar to that of the silicates. But, instead of silicon, phosphates have an atom of phosphorus, arsenic, or vanadium bonded to oxygen. Although there are many minerals in this group, most of the minerals are rare.