Antibonding
In chemical bonding theory, an antibonding orbital is a type of molecular orbital that, if occupied by electrons, weakens the bond between two atoms and helps to raise the energy of the molecule relat...
Antibonding - Wikipedia
Abegg's rule
In chemistry, Abegg’s rule states that the difference between the maximum positive and negative valence of an element is frequently eight. The rule used a historic meaning of valence which resembles ...
Abegg's rule - Wikipedia
Mixed potential theory
Mixed potential theory is a theory used in electrochemistry that relates the potentials and currents from differing constituents to come up with a 'weighted' potential at zero net current. In other wo...
LCP theory
In chemistry, ligand close packing theory (LCP theory), sometimes called the ligand close packing model describes how ligand – ligand repulsions affect the geometry around a central atom. It has been...
Transition state theory
Transition state theory (TST) explains the reaction rates of elementary chemical reactions. The theory assumes a special type of chemical equilibrium (quasi-equilibrium) between reactants and activate...
Transition state theory - Wikipedia
History of quantum mechanics
The history of quantum mechanics is a fundamental part of the history of modern physics. Quantum mechanics' history, as it interlaces with the history of quantum chemistry, began essentially with a nu...
History of quantum mechanics - Wikipedia
Molecular orbital theory
In chemistry, molecular orbital (MO) theory is a method for determining molecular structure in which electrons are not assigned to individual bonds between atoms, but are treated as moving under the i...
Trouton's rule
Trouton’s rule states that the entropy of vaporization is almost the same value, about 85–88 J K mol, for various kinds of liquids at their boiling points. The entropy of vaporization is defined as t...
Plum pudding model
The plum pudding model was a model of the atom that incorporated the recently discovered electron, and was proposed by J. J. Thomson in 1904. Thomson had discovered the electron in 1897. The plum pudd...
Plum pudding model - Wikipedia
Rutherford model
3D animation of an atom incorporating the Rutherford modelThe Rutherford model is a model of the atom devised by Ernest Rutherford. Rutherford directed the famous Geiger–Marsden experiment in 1909 ...
Rutherford model - Wikipedia
Bohr model
In atomic physics, the Rutherford–Bohr model or Bohr model, introduced by Niels Bohr in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular or...
Bohr model - Wikipedia
VSEPR theory
Valence shell electron pair repulsion (VSEPR) theory is a model used, in chemistry, to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms. I...
VSEPR theory - Wikipedia
Atomic theory
In chemistry and physics, atomic theory is a scientific theory of the nature of matter, which states that matter is composed of discrete units called atoms. It began as a philosophical concept in anci...
Atomic theory - Wikipedia
Isotope
Isotopes are variants of a particular chemical element which differ in neutron number, although all isotopes of a given element have the same number of protons in each atom. The term isotope is formed...
Isotope - Wikipedia
Electron
The electron is a subatomic particle, symbol e− or β−, with a negative elementary electric charge. Electrons belong to the first generation of the lepton particle family, and are gen...
Electron - Wikipedia
Kepert model
The Kepert model is a modification of VSEPR theory used to predict the 3-dimensional structures of transitional metal complexes. In the Kepert model, the ligands attached to the metal are considered t...
Diamonds on Jupiter and Saturn
A team of planetary scientists recently claimed that the mix of methane, carbon and lightning in Saturn's atmosphere is causing diamonds to be forged in the planet's atmosphere. These diamonds would b...
Diamonds on Jupiter and Saturn - Wikipedia
Atomic orbital
An atomic orbital is a mathematical function that describes the wave-like behavior of either one electron or a pair of electrons in an atom. This function can be used to calculate the probability of f...
Atomic orbital - Wikipedia
Cage effect
The cage effect in chemistry describes how properties of a molecule are affected by its surroundings.In a solvent a molecule is often more accurately described existing in a cage of solvent molecules,...
Atomic nucleus
The nucleus is the very dense region consisting of protons and neutrons at the center of an atom. It was discovered in 1911 as a result of Ernest Rutherford's interpretation of the 1909 Geiger–Marsden...
Atomic nucleus - Wikipedia