What does chemically unstable mean?
Chemical instability is the reactive and decomposition ability of substances or species. Chemical instability, when used in the technical sense, means thermodynamic instability of a chemical system. Compounds or mixtures that are chemically unstable are often called labile.
What is meaning of chemical stability?
Chemical stability is the resistance to attachment by chemical action. In materials science, a chemical substance is said to be stable if it is not particularly reactive in the environment or during normal use, and retains its useful properties on the timescale of its expected usefulness.
What is the meaning of stable and unstable in chemistry?
When an atom has an extra electron or a missing electron, it is unstable. When that atom loses or gains the electron, it becomes stable. Stable atoms have lower energy than unstable ones.
What makes a chemical compound unstable?
In particular, the usefulness is retained in the presence of air, moisture or heat, and under the expected conditions of application. In this meaning, the material is said to be unstable if it can corrode, decompose, polymerize, burn or explode under the conditions of anticipated use or normal environmental conditions.
What is chemical stability of a drug?
Most drugs are small organic molecules. The main chemical reactions that affect the stability of a drug are oxidation and hydrolysis. Oxidation involves the removal of electrons from a molecule (or the addition of oxygen) and such reactions can be initiated by light, heat or certain trace metals.
Is water stable or unstable?
The tremendous energy that is released is a signal that hydrogen and oxygen are very eager to become water. Another way of saying that is that water is an extremely stable compound, compared with loose molecules of hydrogen and oxygen. It is hard to break water molecules apart into its components.
Are chemical compounds stable or unstable?
A chemical which is stable is unreactive, and a chemical which is unstable is reactive. Reactivity depends on Unequal Distribution of Electrons (UDED) in a chemical species (molecule, atom, ion).
Is bromine stable or unstable?
Natural bromine is a mixture of two stable isotopes: bromine-79 (50.54 percent) and bromine-81 (49.46 percent). Of the 17 known radioactive isotopes of the element, bromine-77 has the longest half-life (57 hours).
How do you know if something is stable or unstable?
An equilibrium is considered stable (for simplicity we will consider asymptotic stability only) if the system always returns to it after small disturbances. If the system moves away from the equilibrium after small disturbances, then the equilibrium is unstable.
What does unstable mean in medical terms?
Medical Definition of unstable : not stable: as. a : characterized by frequent or unpredictable changes a patient in unstable condition. b : readily changing (as by decomposing) in chemical composition or biological activity unstable compounds.
What is the meaning of unstable in chemistry?
marked by emotional instability: an unstable person. irregular in movement: an unstable heartbeat. Chemistry. noting compounds that readily decompose or change into other compounds. 2 precarious. 3 vacillating. QUIZ YOURSELF ON AFFECT VS. EFFECT!
What does chemical instability mean?
Definition – What does Chemical Instability mean? Chemical instability is the reactive and decomposition ability of substances or species. Chemical instability, when used in the technical sense, means thermodynamic instability of a chemical system. Compounds or mixtures that are chemically unstable are often called labile.
Are gas mixtures with only one chemically unstable gas considered unstable?
Gas mixtures containing only one chemically unstable gas in concentrations below the specific concentration limit are not considered as chemically unstable and therefore do not have to be tested for classification purposes. A chemically unstable gas means a flammable gas that is able to react explosively even in the absence of air or oxygen.
What are unstable subatomic particles?
Many subatomic particles, such as muons and neutrons, are unstable and decay quickly into other particles. See more at decay. Relating to a chemical compound that readily decomposes or changes into other compounds or into elements. Relating to an atom or chemical element that is likely to share electrons; reactive.