User:Paul Wormer

I retired in 2005 from the Radboud University in Nijmegen (The Netherlands) as an Associate Professor in Theoretical Chemistry. Over the years I (co)authored about 150 research papers published in journals as "the Journal of Chemical Physics", "Molecular Physics", "Physical Review A", etc., see here for a fairly complete list. I got a (cum laude) MSc in Chemical Engineering, but after an internship at a Haber-Bosch plant I decided that Theoretical Chemistry was more my cup of tea. My (cum laude) Ph.D. thesis was on Group Theory and the Theory of Intermolecular Forces; both topics still hold my interest. Most of my working life was on the crossing of Chemistry, Molecular Physics, and Applied Mathematics. Several times I held an appointment as a Visiting Research Professor in Applied Mathematics at the University of Waterloo in Ontario. I was a Visiting Fellow of the Royal Society in Bristol and a Visiting Professor of Theoretical Chemistry in Warsaw.

From October 2006 until August 2007 I contributed to Wikipedia under the name P.wormer. After my relatively late arrival at WP I found that most basic science articles were already in existence, so I added mostly to the niche of more advanced, graduate level, science. After a probation period of nine months I got fed up with continuously defending my work against attacks by science illiterates and fled to Citizendium. On CZ I soon discovered that this encyclopedia was almost virginal and that the foundation in science still had to be laid. So, I will add as many basic science articles as I can to CZ.

I am not a native speaker of English and appreciate it very much when my grammar/spelling/wording is improved. I hate it, however, when content that I contributed is removed without good explanation (in the associated talk page or my personal talk page). So, please, if you feel it necessary to delete some of my work (and possibly replace it with something else), explain to me why you think so. I may even agree with you! In Wikipedia I was sometimes criticized as being too abstruse and I had to agree with that several times, after which I tried to do a better job. So, please let me know if you don't understand my writings; together we can make something nice.

On December 24, 2007 I prepared the following list of CZ articles of which I am the main (often the sole) author.

•  Amedeo Avogadro: (August 9, 1776 – July 9, 1856). An Italian physicist who proposed in 1811 Avogadro's law. ^[e]
•  Amsterdam: The capital city of the Netherlands; 2007 population 743,100. ^[e]
• Angular momentum: Please do not use this term in your topic list, because there is no single article for it. Please substitute a more precise term. See Angular momentum (disambiguation) for a list of available, more precise, topics. Please add a new usage if needed.
•  Angular momentum coupling: The procedure of constructing eigenvectors of a system's angular momentum out of angular momentum eigenvectors of its subsystems. ^[e]
•  Antisymmetrizer: operator that projects onto an antisymmetric subspace of a tensor product space of identical linear spaces; ^[e]
•  Associated legendre function: Add brief definition or description
• Atom: Please do not use this term in your topic list, because there is no single article for it. Please substitute a more precise term. See Atom (disambiguation) for a list of available, more precise, topics. Please add a new usage if needed.
•  Atomic electron configuration: A specification of the occupation of an atom's electron orbitals by electrons. ^[e]
•  Atomic mass: The mass of an atom expressed in unified atomic mass units (u) and formerly known as atomic weight. ^[e]
•  Atomic mass constant: One twelfth of the mass of a carbon-12 atom in its nuclear and electronic ground state. It is equal to the unified atomic mass unit. ^[e]
•  Atomic orbital: Function in quantum mechanics describing the motion of an electron around the nucleus of an atom. ^[e]
• Atomic weight: Add brief definition or description
•  Augustin-Louis Cauchy: (1789 – 1857) prominent French mathematician, one of the pioneers of rigor in mathematics and complex analysis. ^[e]
•  Avogadro's constant: The number of entities (such as atoms, ions, or molecules) per mole; dimension mol^{−1 [e]}
•  Belgium: Federal monarchy (population c. 10.5 million; capital Brussels) in western Europe, located between France, Germany and the Netherlands, and with a short coastline on the North Sea; founding member of the European Union. ^[e]
•  Born-Oppenheimer approximation: A technique in quantum mechanics in which the kinetic energies of nuclei and electrons are calculated separately. ^[e]
•  Carbon: Fourth most abundant chemical element in the Universe, with atomic number Z=6. ^[e]
•  Carbon dioxide: Chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom. ^[e]
•  Classification of rigid rotors: A terminological scheme to classify rigid rotors by the relative size of their principal moments of inertia. ^[e]
•  Clebsch-Gordan coefficients: appear in total angular momentum eigenstates when written in terms of angular momentum states of subsystems. ^[e]
• Copernicus: Add brief definition or description
• Dalton (unit): A unit of atomic and molecular mass, the Unified atomic mass unit. ^[e]
•  Digital object identifier: Unique label for a computer readable object that can be found on the internet, usually used in academic journals. ^[e]
•  Distribution (mathematics): Objects which generalize functions, used to formulate generalized solutions of partial differential equations. ^[e]
•  Eckart conditions: Equations describing the conditions under which the vibrations of molecules can be separated from molecular rotations and translations ^[e]
•  Electron: Elementary particle that carries a negative elementary charge −e and has mass 9.109 382 91 × 10⁻³¹ kg. ^[e]
•  Electron configuration: The arrangement of electrons of an atom, a molecule, or other physical structure, distributed in the orbitals of the given system. ^[e]
•  Electron orbital: Quantum mechanical quadratically integrable one-electron function (function of the coordinates of one electron) ^[e]
•  Elementary charge: Charge of electron (negative) and proton (positive); before discovery of the quark thought to be the smallest possible electric charge, written $e$, value 1.602 176 53(14) × 10⁻¹⁹ C ^[e]
•  Elements: In one sense, refers to species or types of atoms, each species/type distinguished by the number of protons in the nuclei of the atoms belonging to the species/type, each species/type having a unique number of nuclear protons; in another sense, refers to substances, or pieces of matter, each composed of multiple atoms solely of a single species/type. ^[e]
• Energy: Please do not use this term in your topic list, because there is no single article for it. Please substitute a more precise term. See Energy (disambiguation) for a list of available, more precise, topics. Please add a new usage if needed.
• Faraday's constant: Add brief definition or description
•  Gaussian type orbitals: Functions used as atomic orbitals in the LCAO method for the computation of electron orbitals in molecules. ^[e]
•  Gravitation: The tendency of objects with mass to accelerate toward each other. ^[e]
•  Holland: The western part of the Netherlands bordering the North Sea, divided into the provinces Noord Holland and Zuid Holland. ^[e]
•  Hydrogen: The most abundant and lightest chemical element which has atomic number Z = 1 and chemical symbol H. ^[e]
•  Hydrogen-like atom: An atom, excluding hydrogen itself, with only one electron, having charge +(Z-1), where Z = atomic number. ^[e]
•  Ideal gas law: Relates pressure, volume and temperature for hypothetical gases of atoms or molecules with negligible intermolecular forces. ^[e]
• Intermolecular force: Add brief definition or description
•  Iron: An important transition metal and chemical element with the symbol Fe (Latin: ferrum) and atomic number 26. ^[e]
•  Jacobus Kapteyn: same as Jacobus Kapteijn; Dutch astronomer (1851 - 1922). ^[e]
•  Johannes Diderik van der Waals: (1837 – 1923) Dutch scientist, proposed the van der Waals equation of state for gases. ^[e]
•  Johannes Kepler: (1571-1630) German astronomer best known for his three laws of planetary motion. ^[e]
•  Kilogram: The kilogram is the basic unit of mass in the International System of Units (SI, metric system). ^[e]
•  Laplace expansion (potential): An expansion by means of which the determinant of a matrix may be computed in terms of the determinants of all possible smaller square matrices contained in the original. ^[e]
•  Legendre polynomials: Add brief definition or description
• Liter: Add brief definition or description
•  Lucasian chair: Add brief definition or description
•  Methane: Add brief definition or description
•  Molar gas constant: Add brief definition or description
•  Mole (unit): Add brief definition or description
•  Molecular Hamiltonian: Add brief definition or description
•  Molecular mass: Add brief definition or description
•  Molecular orbital: Add brief definition or description
• Molecular weight: Add brief definition or description
•  Moller-Plesset: Add brief definition or description
•  Multipole expansion (interaction): Add brief definition or description
•  Multipole expansion of electric field: Add brief definition or description
•  National Institute of Standards and Technology: Add brief definition or description
•  Netherlands: Add brief definition or description
•  Nicolaus Copernicus: Add brief definition or description
•  Nitrogen: Add brief definition or description
• Orbital: Add brief definition or description
•  Oxygen: Add brief definition or description
•  Planck's constant: Add brief definition or description
•  Ptolemy: Add brief definition or description
• Relative molecular mass: Add brief definition or description
•  Rigid rotor: Add brief definition or description
•  Rotterdam: Add brief definition or description
•  Slater determinant: Add brief definition or description
•  Slater orbital: Add brief definition or description
•  Solid harmonics: Add brief definition or description
•  Spherical harmonics: Add brief definition or description
•  Stark effect: Add brief definition or description
•  The Hague: Add brief definition or description
•  Unified atomic mass unit: Add brief definition or description
•  Van der Waals equation: Add brief definition or description
•  Van der Waals forces: Add brief definition or description
•  Van der Waals molecule: Add brief definition or description
•  Van der Waals radius: Add brief definition or description
•  Wigner D-matrix: Add brief definition or description

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