Table 1: Continued fraction representations of the 20 most accurately determined atomic weights
(Helium and the set of 19 mononuclidic non-radioactive elements), x = 1.
Just as the weight listed on your driver's license doesn't necessarily reflect your actual poundage, the official atomic weights
of most chemical elements are actually more like ballpark estimates than precise constants.
At a conference held in Karlsruhe, Germany, chemists discuss the need for an improved and consistent atomic weight
It was then found that the vast majority of atomic weights
of the polynuclidic elements could be reproduced through continued fractions as well.
Medium atomic weights
are available - Gold, Lead, Copper, Jet, Diamond, Radium, Sapphire, Silver and Steel.
In this way, inaccuracies due to uncertainties in the atomic weights
of the elements are largely eliminated, since the latter are likely to be the same in all proteins in a given sample.
New features in the 2004 edition include 1,200 updated chemical structures; 978 modified entries; 112 new generic drug names (with 54 new USAN listings); and approximately 734 recomputed molecular weights based on the latest atomic weights
Isotopes are variants of the same element with different atomic weights
This machine knows the atomic weights
of millions of microscopic particles and can recognise each one.
IUPAC Commission on Atomic Weights
and Isotopic Abundances, Pure Appl.
IUPAC is recognized as the world authority on chemical nomenclature, terminology, standardized methods for measurement, atomic weights
and many other critically evaluated data.
Table gets flex The atomic weights
of 10 chemical elements in the periodic table (including chlorine, below) are listed as ranges rather than single numbers, the first phase in an overhaul of almost every element in the table (SN: 1/29/11, p.