Wednesday, April 1, 2020
Definition of Plasma in Chemistry
Definition of Plasma in ChemistryThere is an interesting and extensive debate on the definition of plasma in chemistry. Many scientists believe that plasma is simply the ionized gas in an electrically conductive medium. Others, however, tend to emphasize the particles in this substance. Despite this, there are many differences between the definitions of these two extremes.The first argument that people often bring up on the topic of plasma is that the ionized gas is simply a gas in a non-conducting medium, which does not include any liquids or solids. Many scientists do agree with this statement. However, they also emphasize that this does not mean that this gas is in itself ionized. Rather, they often consider the gas to be at the 'critical point' (where it is electrically conductive) and thus to have a high tendency to ionize. In other words, the gas is a non-conducting medium for ionization.On the other hand, some scientists emphasize that when referring to a non-ionized gas, they usually mean that the gas is electrically conductive but that the atoms are not ionized. They argue that the gas has no atoms at all, only particles. So while there is a gas, it is still the individual atoms that are present in the gas. This is often called the 'solid-state' interpretation of plasma. It is thought that because these gases do not have atoms in them, they are said to be non-ionized.This may be the most common term used for this concept. It is also the way that chemistry textbooks describe it in their text. However, the terms 'electrically conductive medium'gas' can be used interchangeably when describing plasma. Also, there is often confusion on whether or not the plasma has to be in a semiconductor state (which is a conducting medium) to be ionized. These terms can often be used interchangeably, especially in the context of describing electrical conductivity. However, this is not always true. A plasma can be in an even or a mixed semiconductor (non-conducting medium ). As such, an electron pair does not need to exist to be ionized, which means that the term 'ionized' may be used in any situation where a gas is described as being ionized.When referring to conductivity, one should note that a conducting medium can be any solid or liquid, including semiconductors, in either an electrical or magnetic state. However, these situations are usually referred to as solid-state. Therefore, if one refers to conductivity as the 'conduction' of ions (or electrons) then one can use the term 'electron-conduction.'Plasma is commonly associated with the presence of these particles. When the particles are in a non-conducting medium, it is referred to as a plasma. However, the properties of the plasma will change depending on its state. For example, an electrically conducting medium will have an electric field in a state of plasma.There are many more definitions of plasma in chemistry. However, one should keep in mind that just because two different definitions ar e used doesn't mean that they are actually referring to the same thing. Therefore, it is very important to take note of the types of definitions that are used in referring to a plasma. Often, they are too technical to be used in everyday conversations, but they can still be used in scientific articles.
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