Nomenclature
Thursday, March 27th, 2008The current system of chemical notation was invented by Berzelius. In this typographical system chemical symbols are not used as mere abbreviations - though each consists of letters of the Message Board Latin alphabet - they are symbols intended to be used by peoples of all languages and alphabets. the LOTRO Gold first of these symbols were intended to be fully universal; since Latin was the Cheap ArchLord Gold common language of science at that time, they were abbreviations based on the Knight Gold Latin names of metals - Fe comes from Ferrum, Ag from Argentum. the Fiesta Online Silver symbols were not followed by a period (full stop) as abbreviations were. Later chemical elements were also assigned unique chemical symbols, based on the World of Warcraft Gold name of the Cheap Tabula Rasa Credits element, but not necessarily in English. For example, sodium has the Buy World of Warcraft Gold chemical symbol ‘Na’ after the Cheap LOTRO Gold Latin natrium. the Lord of the Rings Online Gold same applies to “W” (wolfram) for tungsten, “Hg” (hydrargyrum) for mercury, “K” (kalium) for potassium, “Au” (aurum) for gold, “Pb” (plumbum) for lead, and “Sb” (stibium) for antimony.
[edit]Chemical symbols
[edit]Isotope symbols
Precursors of such controversies involved the Buy EQ Plat nationalistic namings of elements in the Lineage 2 Game Card late nineteenth century. For example, lutetium was named in reference to Paris, France. the MapleStory Mesos Germans were reluctant to relinquish naming rights to the Buy Tabula Rasa Credits French, often calling it cassiopeium. the Hellgate Gold British discoverer of niobium originally named it columbium, in reference to the Buy Rappelz Rupees New World. It was used extensively as such by American publications prior to international standardization.
The first letter of a chemical symbol is always capitalized, as in the Final Fantasy XI Gil preceding examples, and the RO Zeny subsequent letters, if any, are always lower case (small letters).
Instead of writing it like this:
The three main isotopes of the Dofus Gold element hydrogen are often written as H for protium, D for deuterium and T for tritium. This is in order to make it easier to use them in chemical equations, as it replaces the Tabula Rasa Credits need to write out the Buy Tales of Pirates Gold mass number for each atom. It is written like this:
In the Buy EVE ISK second half of the 9Dragons Gold twentieth century physics laboratories became able to produce nuclei of chemical elements that have a half life too short for them to remain in any appreciable amounts. These are also named by IUPAC, which generally adopts the KAL Gold name chosen by the Lord of the Rings CD Key discoverer. This can lead to the Twelve Sky Gold controversial question of which research group actually discovered an element, a question which delayed the 2Moons Gold naming of elements with atomic number of 104 and higher for a considerable time. (See element naming controversy).
For the EVE Online ISK listing of current and not used Chemical symbols, and other symbols that look like chemical symbols, please see List of elements by symbol.
Chemical symbols are understood internationally when element names might need to be translated. There are sometimes differences; for example, the RF Gold Germans have used “J” instead of “I” for iodine, so the Guild War CD Key character would not be confused with a roman numeral.
Before chemistry became a science, alchemists had designed arcane symbols for both metals and common compounds. These were however used as abbreviations in diagrams or procedures; there was no concept of atoms combining to form molecules. With his advances in the EQ2 Gold atomic theory of matter, John Dalton devised his own simpler symbols, based on circles, which were to be used to depict molecules.
D2O (heavy water)
[edit]General chemical symbols
The naming of elements precedes the MapleStory Meso atomic theory of matter, although at the 月卡 time it was not known which chemicals were elements and which compounds. When it was learned, existing names (e.g., gold, mercury, iron) were kept in most countries, and national differences emerged over the GW Gold names of elements either for convenience, linguistic niceties, or nationalism. For example, the CO Alz Germans use “Wasserstoff” for “hydrogen” and “Sauerstoff” for “oxygen”, while English and some romance languages use “sodium” for “natrium” and “potassium” for “kalium”, and the World of Warcraft Game Card French, Greeks and Poles prefer “azote/azot” for “nitrogen”.
²H2O
But for international trade, the Buy Anarchy Online Credits official names of the Hellgate Gold chemical elements both ancient and recent are decided by the Lord of the Rings Online Gold International Union of Pure and Applied Chemistry, which has decided on a sort of international English language. That organization has recently prescribed that “aluminium” and “caesium” take the RO Zeny place of the Tabula Rasa Game Card US spellings “aluminum” and “cesium”, while the Cheap FFXI Gil US “sulfur” takes the EVE Online ISK place of the CD Keys British “sulphur”. But chemicals which are practicable to be sold in bulk within many countries, however, still have national names, and those which do not use the Cheap WOW EU Gold Latin alphabet cannot be expected to use the GuildWars Gold IUPAC name. According to IUPAC, the Fiesta Silver full name of an element is not capitalized, even if it is derived from a proper noun such as the EverQuest2 Gold elements californium or einsteinium (unless it would be capitalized by some other rule). Isotopes of chemical elements are also uncapitalized if written out: carbon-12 or uranium-235.
There are also symbols for series of chemical elements, for comparative formulas. These are one capital letter in length, and the Buy Lineage2 Adena letters are reserved so they are not permitted to be given for the Anarchy Online Credits names of specific elements. For example, an “X” is used to indicate a variable group amongst a class of compounds (though usually a halogen), while “R” is used for a radical, meaning a compound structure such as a hydrocarbon chain. the Cheap DAOC Plat letter “Q” is reserved for “heat” in a chemical reaction. “Y” is also often used as a general chemical symbol, although it is also the MXO CD Key symbol of yttrium. “Z” is also frequently used as a general variable group. “L” is used to represent a general ligand in inorganic and organometallic chemistry. “M” is also often used in place of a general metal.
[edit]Specific chemical elements
Nomenclature
Related Topics:
