ionisation
Definition
Ionisation (noun) 1. The process of ionizing; the formation of ions: This refers to the physical or chemical process by which an atom or molecule acquires a net electric charge by gaining or losing electrons, often due to the action of strong electric fields, heat, radiation, or chemical reactions. 2. The condition of being dissociated into ions: This describes the state of a substance (particularly a gas) after it has undergone ionization, where it consists of charged particles rather than neutral atoms or molecules.
Usage
- Ionisation is a scientific term primarily used in physics and chemistry.
- It describes both the of creating ions and the resulting of a material.
- It is often discussed in contexts involving plasmas, radiation, electrical discharges, and chemical analysis.
Examples
- The ionisation of air by a high-voltage spark creates a conductive path for electricity.
- Ultraviolet radiation from the sun causes the ionisation of atoms in the Earth's upper atmosphere, forming the ionosphere.
- The degree of ionisation in the plasma determines its electrical properties.
- Mass spectrometry relies on the ionisation of sample molecules for analysis.
Advanced Usage
- Ionisation energy: The minimum energy required to remove an electron from an atom or molecule in its gaseous state.
- Helium has the highest first ionisation energy among the elements.
- Degree of ionisation: The proportion of neutral particles that have been converted into ions.
- At very high temperatures, the gas achieves a high degree of ionisation.
Variants and Related Words
- Ionize (verb): To convert or be converted into ions.
- The intense heat can ionize the gas.
- Ionized (adjective): Having been converted into ions.
- An ionized gas is called a plasma.
- Ion (noun): An atom or molecule with a net electric charge.
- Deionisation (noun): The process of removing ions from a substance.
Synonyms
- Ionization (American English spelling)
- Dissociation (specifically into ions)
Related Phrases and Concepts
- Ionisation chamber: A device for detecting ionizing radiation by measuring the electrical charge produced by ionisation within a gas.
- Ionisation potential: Another term for ionisation energy.
- Photoionisation: Ionisation caused by absorption of photons (light or other electromagnetic radiation).
- Photoionisation is the primary process by which the interstellar medium is ionized.
Noun
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the process of ionizing; the formation of ions by separating atoms or molecules or radicals or by adding or subtracting electrons from atoms by strong electric fields in a gas
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the condition of being dissociated into ions (as by heat or radiation or chemical reaction or electrical discharge)
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the ionization of a gas
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