Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Download
Faster access than browser!
 

Metastability

Index Metastability

In physics, metastability is a stable state of a dynamical system other than the system's state of least energy. [1]

81 relations: Abelian sandpile model, Absolute zero, Activation energy, Adenosine triphosphate, Allotropy, Amorphous solid, Atom, Atomic nucleus, Avalanche, Boron, Catalysis, Chaos theory, Chemical bond, Chemical kinetics, Chemical stability, Chemistry, Cluster chemistry, Cofactor (biochemistry), Colloid, Computational neuroscience, Crystal structure, Degenerate energy levels, Diamond, DNA, Dynamical system, Electron, Emulsion, Enzyme, False vacuum, Feedback, Friction, Glass, Graphite, Ground state, Half-life, Hysteresis, International Union of Pure and Applied Chemistry, Intrinsic and extrinsic properties, Isomer, Isospin, Isotope, Macromolecule, Martensite, Maxima and minima, Metastability, Metastability (electronics), Metastability in the brain, Mineral, Molecule, Non-equilibrium thermodynamics, ..., Nucleon, Phase diagram, Physics, Polymer, Polymorphism (materials science), Potential, Pressure, Protein, Quantum, Quantum mechanics, Quantum tunnelling, Quark, Quartz, Reaction intermediate, Rectangular potential barrier, Resonance, RNA, Rydberg atom, Sand, Selection rule, Standard conditions for temperature and pressure, State of matter, Stimulated emission, Subatomic particle, Sublimation (phase transition), Supercooling, Superheating, System dynamics, Technetium-99m, Temperature, Thermal fluctuations. Expand index (31 more) »

Abelian sandpile model

The Abelian sandpile model, also known as the Bak–Tang–Wiesenfeld model, was the first discovered example of a dynamical system displaying self-organized criticality.

New!!: Metastability and Abelian sandpile model · See more »

Absolute zero

Absolute zero is the lower limit of the thermodynamic temperature scale, a state at which the enthalpy and entropy of a cooled ideal gas reach their minimum value, taken as 0.

New!!: Metastability and Absolute zero · See more »

Activation energy

In chemistry and physics, activation energy is the energy which must be available to a chemical or nuclear system with potential reactants to result in: a chemical reaction, nuclear reaction, or other various other physical phenomena.

New!!: Metastability and Activation energy · See more »

Adenosine triphosphate

Adenosine triphosphate (ATP) is a complex organic chemical that participates in many processes.

New!!: Metastability and Adenosine triphosphate · See more »

Allotropy

Allotropy or allotropism is the property of some chemical elements to exist in two or more different forms, in the same physical state, known as allotropes of these elements.

New!!: Metastability and Allotropy · See more »

Amorphous solid

In condensed matter physics and materials science, an amorphous (from the Greek a, without, morphé, shape, form) or non-crystalline solid is a solid that lacks the long-range order that is characteristic of a crystal.

New!!: Metastability and Amorphous solid · See more »

Atom

An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.

New!!: Metastability and Atom · See more »

Atomic nucleus

The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment.

New!!: Metastability and Atomic nucleus · See more »

Avalanche

An avalanche (also called a snowslide) is a cohesive slab of snow lying upon a weaker layer of snow in the snowpack that fractures and slides down a steep slope when triggered.

New!!: Metastability and Avalanche · See more »

Boron

Boron is a chemical element with symbol B and atomic number 5.

New!!: Metastability and Boron · See more »

Catalysis

Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalysthttp://goldbook.iupac.org/C00876.html, which is not consumed in the catalyzed reaction and can continue to act repeatedly.

New!!: Metastability and Catalysis · See more »

Chaos theory

Chaos theory is a branch of mathematics focusing on the behavior of dynamical systems that are highly sensitive to initial conditions.

New!!: Metastability and Chaos theory · See more »

Chemical bond

A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds.

New!!: Metastability and Chemical bond · See more »

Chemical kinetics

Chemical kinetics, also known as reaction kinetics, is the study of rates of chemical processes.

New!!: Metastability and Chemical kinetics · See more »

Chemical stability

Chemical stability when used in the technical sense in chemistry, means thermodynamic stability of a chemical system.

New!!: Metastability and Chemical stability · See more »

Chemistry

Chemistry is the scientific discipline involved with compounds composed of atoms, i.e. elements, and molecules, i.e. combinations of atoms: their composition, structure, properties, behavior and the changes they undergo during a reaction with other compounds.

New!!: Metastability and Chemistry · See more »

Cluster chemistry

In chemistry, a cluster is an ensemble of bound atoms or molecules that is intermediate in size between a molecule and a bulk solid.

New!!: Metastability and Cluster chemistry · See more »

Cofactor (biochemistry)

A cofactor is a non-protein chemical compound or metallic ion that is required for an enzyme's activity.

New!!: Metastability and Cofactor (biochemistry) · See more »

Colloid

In chemistry, a colloid is a mixture in which one substance of microscopically dispersed insoluble particles is suspended throughout another substance.

New!!: Metastability and Colloid · See more »

Computational neuroscience

Computational neuroscience (also known as theoretical neuroscience or mathematical neuroscience) is a branch of neuroscience which employs mathematical models, theoretical analysis and abstractions of the brain to understand the principles that govern the development, structure, physiology and cognitive abilities of the nervous system.

New!!: Metastability and Computational neuroscience · See more »

Crystal structure

In crystallography, crystal structure is a description of the ordered arrangement of atoms, ions or molecules in a crystalline material.

New!!: Metastability and Crystal structure · See more »

Degenerate energy levels

In quantum mechanics, an energy level is degenerate if it corresponds to two or more different measurable states of a quantum system.

New!!: Metastability and Degenerate energy levels · See more »

Diamond

Diamond is a solid form of carbon with a diamond cubic crystal structure.

New!!: Metastability and Diamond · See more »

DNA

Deoxyribonucleic acid (DNA) is a thread-like chain of nucleotides carrying the genetic instructions used in the growth, development, functioning and reproduction of all known living organisms and many viruses.

New!!: Metastability and DNA · See more »

Dynamical system

In mathematics, a dynamical system is a system in which a function describes the time dependence of a point in a geometrical space.

New!!: Metastability and Dynamical system · See more »

Electron

The electron is a subatomic particle, symbol or, whose electric charge is negative one elementary charge.

New!!: Metastability and Electron · See more »

Emulsion

An emulsion is a mixture of two or more liquids that are normally immiscible (unmixable or unblendable).

New!!: Metastability and Emulsion · See more »

Enzyme

Enzymes are macromolecular biological catalysts.

New!!: Metastability and Enzyme · See more »

False vacuum

In quantum field theory, a false vacuum is a hypothetical vacuum that is somewhat, but not entirely, stable.

New!!: Metastability and False vacuum · See more »

Feedback

Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop.

New!!: Metastability and Feedback · See more »

Friction

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.

New!!: Metastability and Friction · See more »

Glass

Glass is a non-crystalline amorphous solid that is often transparent and has widespread practical, technological, and decorative usage in, for example, window panes, tableware, and optoelectronics.

New!!: Metastability and Glass · See more »

Graphite

Graphite, archaically referred to as plumbago, is a crystalline allotrope of carbon, a semimetal, a native element mineral, and a form of coal.

New!!: Metastability and Graphite · See more »

Ground state

The ground state of a quantum mechanical system is its lowest-energy state; the energy of the ground state is known as the zero-point energy of the system.

New!!: Metastability and Ground state · See more »

Half-life

Half-life (symbol t1⁄2) is the time required for a quantity to reduce to half its initial value.

New!!: Metastability and Half-life · See more »

Hysteresis

Hysteresis is the dependence of the state of a system on its history.

New!!: Metastability and Hysteresis · See more »

International Union of Pure and Applied Chemistry

The International Union of Pure and Applied Chemistry (IUPAC) is an international federation of National Adhering Organizations that represents chemists in individual countries.

New!!: Metastability and International Union of Pure and Applied Chemistry · See more »

Intrinsic and extrinsic properties

An intrinsic property is a property of a system or of a material itself or within.

New!!: Metastability and Intrinsic and extrinsic properties · See more »

Isomer

An isomer (from Greek ἰσομερής, isomerès; isos.

New!!: Metastability and Isomer · See more »

Isospin

In nuclear physics and particle physics, isospin is a quantum number related to the strong interaction.

New!!: Metastability and Isospin · See more »

Isotope

Isotopes are variants of a particular chemical element which differ in neutron number.

New!!: Metastability and Isotope · See more »

Macromolecule

A macromolecule is a very large molecule, such as protein, commonly created by the polymerization of smaller subunits (monomers).

New!!: Metastability and Macromolecule · See more »

Martensite

Martensite, named after the German metallurgist Adolf Martens (1850–1914), most commonly refers to a very hard form of steel crystalline structure, but it can also refer to any crystal structure that is formed by diffusionless transformation.

New!!: Metastability and Martensite · See more »

Maxima and minima

In mathematical analysis, the maxima and minima (the respective plurals of maximum and minimum) of a function, known collectively as extrema (the plural of extremum), are the largest and smallest value of the function, either within a given range (the local or relative extrema) or on the entire domain of a function (the global or absolute extrema).

New!!: Metastability and Maxima and minima · See more »

Metastability

In physics, metastability is a stable state of a dynamical system other than the system's state of least energy.

New!!: Metastability and Metastability · See more »

Metastability (electronics)

Metastability in electronics is the ability of a digital electronics system to persist for an unbounded time in an unstable equilibrium or metastable state.

New!!: Metastability and Metastability (electronics) · See more »

Metastability in the brain

In the field of computational neuroscience, the theory of metastability refers to the human brain’s ability to integrate several functional parts and to produce neural oscillations in a cooperative and coordinated manner, providing the basis for conscious activity.

New!!: Metastability and Metastability in the brain · See more »

Mineral

A mineral is a naturally occurring chemical compound, usually of crystalline form and not produced by life processes.

New!!: Metastability and Mineral · See more »

Molecule

A molecule is an electrically neutral group of two or more atoms held together by chemical bonds.

New!!: Metastability and Molecule · See more »

Non-equilibrium thermodynamics

Non-equilibrium thermodynamics is a branch of thermodynamics that deals with physical systems that are not in thermodynamic equilibrium but can be described in terms of variables (non-equilibrium state variables) that represent an extrapolation of the variables used to specify the system in thermodynamic equilibrium.

New!!: Metastability and Non-equilibrium thermodynamics · See more »

Nucleon

In chemistry and physics, a nucleon is either a proton or a neutron, considered in its role as a component of an atomic nucleus.

New!!: Metastability and Nucleon · See more »

Phase diagram

A phase diagram in physical chemistry, engineering, mineralogy, and materials science is a type of chart used to show conditions (pressure, temperature, volume, etc.) at which thermodynamically distinct phases occur and coexist at equilibrium.

New!!: Metastability and Phase diagram · See more »

Physics

Physics (from knowledge of nature, from φύσις phýsis "nature") is the natural science that studies matterAt the start of The Feynman Lectures on Physics, Richard Feynman offers the atomic hypothesis as the single most prolific scientific concept: "If, in some cataclysm, all scientific knowledge were to be destroyed one sentence what statement would contain the most information in the fewest words? I believe it is that all things are made up of atoms – little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another..." and its motion and behavior through space and time and that studies the related entities of energy and force."Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regular succession of events." Physics is one of the most fundamental scientific disciplines, and its main goal is to understand how the universe behaves."Physics is one of the most fundamental of the sciences. Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology. No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physics. (...) You will come to see physics as a towering achievement of the human intellect in its quest to understand our world and ourselves."Physics is an experimental science. Physicists observe the phenomena of nature and try to find patterns that relate these phenomena.""Physics is the study of your world and the world and universe around you." Physics is one of the oldest academic disciplines and, through its inclusion of astronomy, perhaps the oldest. Over the last two millennia, physics, chemistry, biology, and certain branches of mathematics were a part of natural philosophy, but during the scientific revolution in the 17th century, these natural sciences emerged as unique research endeavors in their own right. Physics intersects with many interdisciplinary areas of research, such as biophysics and quantum chemistry, and the boundaries of physics are not rigidly defined. New ideas in physics often explain the fundamental mechanisms studied by other sciences and suggest new avenues of research in academic disciplines such as mathematics and philosophy. Advances in physics often enable advances in new technologies. For example, advances in the understanding of electromagnetism and nuclear physics led directly to the development of new products that have dramatically transformed modern-day society, such as television, computers, domestic appliances, and nuclear weapons; advances in thermodynamics led to the development of industrialization; and advances in mechanics inspired the development of calculus.

New!!: Metastability and Physics · See more »

Polymer

A polymer (Greek poly-, "many" + -mer, "part") is a large molecule, or macromolecule, composed of many repeated subunits.

New!!: Metastability and Polymer · See more »

Polymorphism (materials science)

In materials science, polymorphism is the ability of a solid material to exist in more than one form or crystal structure.

New!!: Metastability and Polymorphism (materials science) · See more »

Potential

Potential generally refers to a currently unrealized ability.

New!!: Metastability and Potential · See more »

Pressure

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

New!!: Metastability and Pressure · See more »

Protein

Proteins are large biomolecules, or macromolecules, consisting of one or more long chains of amino acid residues.

New!!: Metastability and Protein · See more »

Quantum

In physics, a quantum (plural: quanta) is the minimum amount of any physical entity (physical property) involved in an interaction.

New!!: Metastability and Quantum · See more »

Quantum mechanics

Quantum mechanics (QM; also known as quantum physics, quantum theory, the wave mechanical model, or matrix mechanics), including quantum field theory, is a fundamental theory in physics which describes nature at the smallest scales of energy levels of atoms and subatomic particles.

New!!: Metastability and Quantum mechanics · See more »

Quantum tunnelling

Quantum tunnelling or tunneling (see spelling differences) is the quantum mechanical phenomenon where a particle tunnels through a barrier that it classically cannot surmount.

New!!: Metastability and Quantum tunnelling · See more »

Quark

A quark is a type of elementary particle and a fundamental constituent of matter.

New!!: Metastability and Quark · See more »

Quartz

Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2.

New!!: Metastability and Quartz · See more »

Reaction intermediate

A reaction intermediate or an intermediate is a molecular entity that is formed from the reactants (or preceding intermediates) and reacts further to give the directly observed products of a chemical reaction.

New!!: Metastability and Reaction intermediate · See more »

Rectangular potential barrier

In quantum mechanics, the rectangular (or, at times, square) potential barrier is a standard one-dimensional problem that demonstrates the phenomena of wave-mechanical tunneling (also called "quantum tunneling") and wave-mechanical reflection.

New!!: Metastability and Rectangular potential barrier · See more »

Resonance

In physics, resonance is a phenomenon in which a vibrating system or external force drives another system to oscillate with greater amplitude at specific frequencies.

New!!: Metastability and Resonance · See more »

RNA

Ribonucleic acid (RNA) is a polymeric molecule essential in various biological roles in coding, decoding, regulation, and expression of genes.

New!!: Metastability and RNA · See more »

Rydberg atom

A Rydberg atom is an excited atom with one or more electrons that have a very high principal quantum number.

New!!: Metastability and Rydberg atom · See more »

Sand

Sand is a naturally occurring granular material composed of finely divided rock and mineral particles.

New!!: Metastability and Sand · See more »

Selection rule

In physics and chemistry, a selection rule, or transition rule, formally constrains the possible transitions of a system from one quantum state to another.

New!!: Metastability and Selection rule · See more »

Standard conditions for temperature and pressure

Standard conditions for temperature and pressure are standard sets of conditions for experimental measurements to be established to allow comparisons to be made between different sets of data.

New!!: Metastability and Standard conditions for temperature and pressure · See more »

State of matter

In physics, a state of matter is one of the distinct forms in which matter can exist.

New!!: Metastability and State of matter · See more »

Stimulated emission

Stimulated emission is the process by which an incoming photon of a specific frequency can interact with an excited atomic electron (or other excited molecular state), causing it to drop to a lower energy level.

New!!: Metastability and Stimulated emission · See more »

Subatomic particle

In the physical sciences, subatomic particles are particles much smaller than atoms.

New!!: Metastability and Subatomic particle · See more »

Sublimation (phase transition)

Sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

New!!: Metastability and Sublimation (phase transition) · See more »

Supercooling

Supercooling, also known as undercooling, is the process of lowering the temperature of a liquid or a gas below its freezing point without it becoming a solid.

New!!: Metastability and Supercooling · See more »

Superheating

In physics, superheating (sometimes referred to as boiling retardation, or boiling delay) is the phenomenon in which a liquid is heated to a temperature higher than its boiling point, without boiling.

New!!: Metastability and Superheating · See more »

System dynamics

System dynamics (SD) is an approach to understanding the nonlinear behaviour of complex systems over time using stocks, flows, internal feedback loops, table functions and time delays.

New!!: Metastability and System dynamics · See more »

Technetium-99m

Technetium-99m is a metastable nuclear isomer of technetium-99 (itself an isotope of technetium), symbolized as 99mTc, that is used in tens of millions of medical diagnostic procedures annually, making it the most commonly used medical radioisotope.

New!!: Metastability and Technetium-99m · See more »

Temperature

Temperature is a physical quantity expressing hot and cold.

New!!: Metastability and Temperature · See more »

Thermal fluctuations

In statistical mechanics, thermal fluctuations are random deviations of a system from its average state, that occur in a system at equilibrium.

New!!: Metastability and Thermal fluctuations · See more »

Redirects here:

Global stability, Kinetic stability, Kinetically stable, Local stability, Meta-stable, Metastability in molecules, Metastable, Metastable State, Metastable molecule, Metastable phase, Metastable state, Quasistability, Quasistable, Unstable Molecules, Unstable molecules.

References

[1] https://en.wikipedia.org/wiki/Metastability

OutgoingIncoming
Hey! We are on Facebook now! »