Atomic weight refers to the average weight of an atom of an element, as compared to the isotope of carbon which is designated to have a weight of twelve. The great historian of chemistry Aaron Ihde has referred to atomic weights as a problem "so...

The molecular weight of a molecule indicates how heavy that molecule is relative to an atom of carbon (with six protons and six neutrons). Saying that the molecular weight of water is 18 means that the water molecule is 18/12 as heavy as a carbon-12...

(MW) The molecular weight of a MOLECULE is the sum of the ATOMIC WEIGHT of all the atoms of which the molecule is composed. One needs to know the molecular weight of a substance in order to be able to prepare solutions of a given MOLARITY. See also:...

The sum of the atomic weights (q.v.) of all of the atoms within a molecule. Generally, molecules of the same type have higher boiling points if the molecular weight is...

The molecular mass (abbreviated Mr) of a substance, formerly also called molecular weight and abbreviated as MW, is the mass of one molecule of that substance, relative to the unified atomic mass unit u (equal to 1/12 the mass of one atom of carbon-12)....

ABSTRACT Radiation target analysis is based on the action of ionizing radiation directly on macromolecules. Interactions of this radiation with the molecules leads to considerable structural damage and consequent loss of biological activity. The radiation sensitivity is dependent on the size of the macromolecules....

S. HILLMANSEN [a][*] S. HOBEIKA [b] R. N. HAWARD [a] P.S. LEEVERS [a] Conventional tensile testing applied to high density polyethylene can lead to erroneous impressions of the tensile response of the material due to a local reduction in...