Results 301 to 310 of about 1,323,419 (340)

Time, Number and the Atom

Nature, 1945
MR. PICKARD is interested in numbers, particularly primes and perfect squares. He points out that the ratio of the masses of the proton and the electron may be taken as 1849, and this is the sum of the consecutive primes from 3 to 131 inclusive; or as Mr.
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ChemInform Abstract: An Element of Atomic Number Zero?

ChemInform, 2016
AbstractReview: 40 refs.
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Number Theory and Atomic Densities

1999
After the initial success to explain the hydrogen atom, one of the early challenges of quantum mechanics was to study larger atoms. The problems encountered in this process were numerous, and the quest for an understanding quickly became a search for simplified quantum atomic models that would explain different properties of the atom.
Luis Seco, Charles Fefferman
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Moseley’s Determination of Atomic Numbers [PDF]

, 1962
One of the earliest important consequences of Max von Laue’s great discovery of X-ray diffraction was its use in verifying the theory of the atomic numbers of the elements. This was done by H.G.J. Moseley in Manchester towards the end of 1913, when he measured the frequencies of the K-spectra of the elements from calcium to zinc.
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The Effective Atomic Number

Radiation Research, 1957
T. Henriksen, J. Baarli
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Atomic number before Moseley

Journal of Chemical Education, 1979
Antonius Johannes van den Broek introduced the idea of atomic number prior to the work of Moseley.
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Cancer treatment and survivorship statistics, 2022

Ca-A Cancer Journal for Clinicians, 2022
Kimberly D Miller, Leticia M Nogueira, Angela B Mariotto   +2 more
exaly  

The Atom Table and the Number Table

2017
The LISP Interpreter program maintains several general data structures. The first data structure is a symbol table with an entry for every named data object. These named data objects are called ordinary atoms, and the symbol table of ordinary atoms is called the atom table.
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Atomic Numbers Versus Atomic Weights

Science, 1924
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Prime Numbers and Atomic Structure

This report explores a novel theory where prime numbers serve as stability points for atomic nuclei, thereby representing the exact position of atomic structures. If this theory is correct, the current periodic table is inaccurately structured, and a spiral model based on prime numbers may better explain the stability and electron distribution of ...
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