Why are common names not always useful in chemistry

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Systematic Chemical Names

why are common names not always useful in chemistry

The first element is always named first, using entire element name. 2. binary covalent compounds generally known by their common names rather than their If no _ is present in the formula for the acidic compound, the acid is named in the .

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Note: this document will print in an appropriately modified format 11 pages. Chemical nomenclature is far too big a topic to treat comprehensively, and it would be a useless diversion to attempt to do so in a beginning course; most chemistry students pick up chemical names and the rules governing them as they go along. But we can hardly talk about chemistry without mentioning some chemical substances, all of which do have names— and often, more than one! All we will try to do here is cover what you need to know to make sense of first-year chemistry. For those of you who plan to go on in chemistry, the really fun stuff comes later!

Molecular compounds are inorganic compounds that take the form of discrete molecules. Ionic compounds are formed when metal atoms lose one or more of their electrons to nonmetal atoms. The resulting cations and anions are electrostatically attracted to each other. So what holds the atoms of a molecule together? Rather than forming ions, the atoms of a molecule share their electrons in such a way that a bond forms between pairs of atoms. In a carbon dioxide molecule, there are two of these bonds, each occurring between the carbon atom and one of the two oxygen atoms.

A less important aim is to ensure that each substance has a single name although a limited number of alternative names is acceptable in some cases. The form of nomenclature used depends on the audience to which it is addressed. As such, no single correct form exists, but rather there are different forms that are more or less appropriate in different circumstances. A common name will often suffice to identify a chemical compound in a particular set of circumstances. However, in a few specific circumstances such as the construction of large indices , it becomes necessary to ensure that each compound has a unique name. In discussing chemistry nomenclatures is it necessary to identify the type of compound including stoichiometry and type of constituent atoms. The first separation of importance is to distinguish between inorganic and organic compounds.

In chemistry , a trivial name is a non systematic name for a chemical substance. A trivial name is not a formal name and is usually a common name. Generally, trivial names are not useful in describing the essential properties of the thing being named. Properties such as the molecular structure of a chemical compound are not indicated. And, in some cases, trivial names can be ambiguous or will carry different meanings in different industries or in different geographic regions.

In chemistry, an ionic compound is a chemical compound in which ions are held together by ionic bonds. Usually, the positively charged portion consists of metal cations and the negatively charged portion is an anion or polyatomic ion. Ionic compounds have high melting and boiling points, and they tend to be hard and brittle. Ions can be single atoms, as the sodium and chlorine in common table salt sodium chloride , or more complex polyatomic groups such as the carbonate in calcium carbonate. But to be considered an ion, they must carry a positive or negative charge. By sticking to each other, they resolve, or partially resolve, their separate charge imbalances. Positive to positive and negative to negative ionic bonds do not occur.

Believe it or not, some chemists do have a sense of humour, and this page is a testament to that. Here we'll show you some real molecules that have unusual, ridiculous or downright silly names. If you know of any other potential candidates for this page, please let me know. People from all over the world have sent me so many contributions to this page, that I've now had to split it into four smaller pages. The 3D structure files of many of these molecules can be obtained by clicking on the images. Information on what you need to view these structure files can be found here.

Trivial name

There are many ways to name a chemical. Here is a look at the difference between different types of chemical names , including systematic names, common names, vernacular names and CAS numbers. A common name is defined by the IUPAC as a name that unambiguously defines a chemical, yet does not follow the current systematic naming convention.


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