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 .
The potassium oxide is a basic oxide, meaning it reacts with acid to produce water and salt only. It is also soluble in water and forms alkalis. It reacts vigorously with water to form potassium hydroxide.