Interaction
Interaction is a kind of action that occurs as two or more objects have an effect upon one another. The idea of a two-way effect is essential in the concept of interaction, as opposed to a one-way cau...
Interaction - Wikipedia
Long-Sought-After 'Glueball': Exotic Particle May Have Been Discovered
Scientists at TU Wien (Vienna) have calculated that the meson f0(1710) could be a very special particle – the long-sought-after glueball, a particle composed of pure force. For decades, scientists hav...
New Type Of Chemical Bond Confirmed
Chemistry students around the globe are pretty familiar with ionic, covalent, hydrogen, and van der Waals bonds, but a study has demonstrated the existence of one more: vibrational bonding. The phenom...
Ionic and covalent bonding animation
Ionic bonding formed when one atom has sufficient strength of attraction to remove ion from the other atom. Covalent bonding occurs when neither atom has suf...
Chemical Bonds: Covalent vs. Ionic - YouTube
Mr. Andersen shows you how to determine if a bond is nonpolar covalent, polar covalent, or ionc. Intro Music Atribution Title: I4dsong_loop_main.wav Artist: ...
Chemical bond
Find out more about Chemical Bonds!
Fundamental interaction
Fundamental interactions, also known as fundamental forces or interactive forces, are the interactions in physical systems that appear not to be reducible to more basic interactions. There are four co...
Chemical bond
A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electrostatic force of attraction between oppo...
Cell-cell interaction
Cell–cell interaction refers to the direct interactions between cell surfaces that play a crucial role in the development and function of multicellular organisms.These interactions allow cells to comm...
Cell-cell interaction - Wikipedia
Coupling (physics)
In physics, two systems are coupled if they are interacting with each other. Of special interest is the coupling of two (or more) vibratory systems (e.g. pendula or resonant circuits) by means of spri...
Interaction energy
In physics, interaction energy is the contribution to the total energy that is caused by an interaction between the objects being considered.The interaction energy usually depends on the relative posi...
Long-Sought-After 'Glueball': Exotic Particle May Have Been Discovered
Scientists at TU Wien (Vienna) have calculated that the meson f0(1710) could be a very special particle – the long-sought-after glueball, a particle composed of pure force. For decades, scientists hav...
New Type Of Chemical Bond Confirmed
Chemistry students around the globe are pretty familiar with ionic, covalent, hydrogen, and van der Waals bonds, but a study has demonstrated the existence of one more: vibrational bonding. The phenom...
Action at a distance
In physics, action at a distance is the concept that an object can be moved, changed, or otherwise affected without being physically touched (as in mechanical contact) by another object. That is, it i...
Electron deficiency
Electron deficiency occurs when a compound has too few valence electrons for the connections between atoms to be described as covalent bonds. Electron deficient bonds are often better described as 3-c...
Exchange force
In physics the term exchange force has been used to describe two distinct concepts which should not be confused.
The preferred meaning of exchange force is in particle physics, where it denotes a ...
Case sensitivity
Text sometimes exhibits case sensitivity; that is, words can differ in meaning based on differing use of uppercase and lowercase letters. Words with capital letters do not always have the same meaning...
Case sensitivity - Wikipedia
Weak interaction
In particle physics, the weak interaction is the mechanism responsible for the weak force or weak nuclear force, one of the four known fundamental interactions of nature, alongside the strong interact...
Electromagnetic field
An electromagnetic field (also EMF or EM field) is a physical field produced by electrically charged objects. It affects the behavior of charged objects in the vicinity of the field. The electromagn...
Covalent radius
The covalent radius, rcov, is a measure of the size of an atom that forms part of one covalent bond. It is usually measured either in picometres (pm) or angstroms (Å), with 1 Å = 100 pm...
Strong interaction
In particle physics, the strong interaction is the mechanism responsible for the strong nuclear force (also called the strong force, nuclear strong force or colour force), one of the four fundamental ...
Strong interaction - Wikipedia
Human fertilization
Human fertilization is the union of a human egg and sperm, usually occurring in the ampulla of the uterine tube. The result of this union is the production of a zygote, or fertilized egg, initiating p...
Human fertilization - Wikipedia
Electron pair
In chemistry, an electron pair or a Lewis pair consists of two electrons that occupy the same orbital but have opposite spins. The electron pair concept was introduced in a 1916 paper of Gilbert N. Le...
Electron pair - Wikipedia
Aromaticity
In organic chemistry, aromaticity is formally used to describe an unusually stable nature of some flat rings of atoms. These structures contain a number of double bonds that interact with each other a...
Aromaticity - Wikipedia
Double bond rule
The double bond rule states that chemical elements with a principal quantum numbergreater than 2 (e.g. Period 3 elements and lower) do not form multiple bonds (e.g. double bonds and triple bonds) with...
Synapse
In the nervous system, a synapse is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another cell (neural or otherwise). Santiago Ramón y Cajal proposed th...
Synapse - Wikipedia
Multicellular organism
Tetrabaena socialis consists of four cells.Multicellular organisms are organisms that consist of more than one cell, in contrast to single-celled organisms.Few unicellular species can be seen indivi...
Multicellular organism - Wikipedia
Cell signaling
Cell signalling is part of a complex system of communication that governs basic cellular activities and coordinates cell actions. The ability of cells to perceive and correctly respond to their microe...
Cell signaling - Wikipedia
D-block contraction
d-block contraction (sometimes called scandide contraction) is a term used in chemistry to describe the effect of having full d orbitals on the period 4 elements. The elements in question are Ga, Ge...
D-block contraction - Wikipedia
Metal aromaticity
In metal aromaticity the concept of aromaticity found in many hydrocarbons is extended to metals. The first experimental evidence for the existence of aromaticity in metals was found in aluminium clus...
Hamaker theory
After the explanation of van der Waals forces by Fritz London several scientists soon realised that his definition could be extended from the interaction of two molecules with induced dipoles to macro...