molecule mass
21molecule — [ mɒlɪkju:l] noun a group of atoms bonded together, representing the smallest fundamental unit of a compound that can take part in a chemical reaction. Origin C18: from Fr. molécule, from mod. L. molecula, dimin. of L. moles mass …
22molecule — mol•e•cule [[t]ˈmɒl əˌkyul[/t]] n. 1) chem. phs the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound 2) chem. a quantity of a substance, the weight… …
23molecule — /ˈmɒləkjul / (say moluhkyoohl) noun 1. Chemistry, Physics the smallest particle of a substance capable of independent existence. 2. a quantity of a substance, the weight of which, measured in any chosen unit, is numerically equal to the molecular …
24molecule — Smallest portion of an element or compound that retains chemical identity with the substance in mass; the smallest portion that matter may be divided into and still retain all the properties of the original matter …
25molecule — n. 1 Chem. the smallest fundamental unit (usu. a group of atoms) of a chemical compound that can take part in a chemical reaction. 2 (in general use) a small particle. Etymology: F moleacutecule f. mod.L molecula dimin. of L moles mass …
26high-resolution mass spectrometer — mass spectrometer mass spectrometer n. (Physics, Chemistry) An analytical instrument which determines the mass of molecules of a substance or fragments of its molecules. It functions by injecting ionized moecules or molecular gragments into a… …
27Molecular mass — This article is about the mass of a single molecule. For the mass of a substance commonly used in basic stoichiometric calculations, see Molar mass. Assuming hydrogen and oxygen are standard weights in this image (as opposed to deuterium oxide)… …
28Gas chromatography-mass spectrometry — (GC MS) is a method that combines the features of gas liquid chromatography and mass spectrometry to identify different substances within a test sample. Applications of GC MS include drug detection, fire investigation, environmental analysis,… …
29Orders of magnitude (mass) — Iron weights up to 50 kilograms depicted in Dictionnaire encyclopédique de l épicerie et des industries annexes. To help compare different orders of magnitude, the following list describes various mass levels between 10−36 kg and 1060 kg …
30Monoisotopic mass — This article is about the mass spectrometry term. For a list of monoisotopic elements, see stable isotope. The monoisotopic mass is the sum of the masses of the atoms in a molecule using the unbound, ground state, rest mass of the principal (most …
