Search results
Results from the WOW.Com Content Network
The caveman is a stock character representative of primitive humans in the Paleolithic. The popularization of the type dates to the early 20th century, when Neanderthals were influentially described as " simian " or " ape -like" by Marcellin Boule [ 1 ] and Arthur Keith .
Le Chatelier–Braun principle analyzes the qualitative behaviour of a thermodynamic system when a particular one of its externally controlled state variables, say , changes by an amount , the 'driving change', causing a change , the 'response of prime interest', in its conjugate state variable , all other externally controlled state variables remaining constant.
In atomic physics and quantum chemistry, the Aufbau principle (/ ˈ aʊ f b aʊ /, from German: Aufbauprinzip, lit. 'building-up principle'), also called the Aufbau rule, states that in the ground state of an atom or ion, electrons first fill subshells of the lowest available energy, then fill subshells of higher energy.
This glossary of chemistry terms is a list of terms and definitions relevant to chemistry, including chemical laws, diagrams and formulae, laboratory tools, glassware, and equipment. Chemistry is a physical science concerned with the composition, structure, and properties of matter , as well as the changes it undergoes during chemical reactions ...
The Lancet called it "proverbial, much quoted or adapted, familiar to multitudes who have never seen its original version or heard of its maker". [2] The image has become better-known than the science behind it. [3] With regard to the way the illustration has been interpreted, the anthropologist and author of the section, F. Clark Howell ...
Superexchange or Kramers–Anderson superexchange interaction, is a prototypical indirect exchange coupling between neighboring magnetic moments (usually next-nearest neighboring cations, see the schematic illustration of MnO below) by virtue of exchanging electrons through a non-magnetic anion known as the superexchange center.
Adiabatic electron-transfer theory stems from London's approach to charge-transfer and indeed general chemical reactions [14] applied by Hush using parabolic potential-energy surfaces. [ 15 ] [ 16 ] Hush himself has carried out many theoretical and experimental studies of mixed valence complexes and long range electron transfer in biological ...
In chemistry, the ball-and-stick model is a molecular model of a chemical substance which displays both the three-dimensional position of the atoms and the bonds between them. [1] The atoms are typically represented by spheres , connected by rods which represent the bonds.