Saturday, July 24, 2010

I have a question about naming compounds?

By only looking at the location of elements on the periodic table, how do you know when to use prefixes (mono, di, tri, tetra...) when naming compounds with two elements?

I have a question about naming compounds?
In naming a binary compound place the metal name first then the nonmetal and add ide. There sometimes are a few letters dropped in the nonmetal, but there is no rule. The number of each atom is not needed in the name except for tranistion metals where the oxidation number is given as a Roman numeral in parantheses.
Reply:its depends on oxidation state of any of the items
Reply:Lancenigo di Villorba (tv), Italy





Dear Lady,





your question concerns the procedure for binary compound's denomination.


As you know, the latters are chemical compounds formed by only two chemical elements.


IUPAC rules stated that you individuate "element leader" among chemical element presents, e.g. usually least spread chemical element: Moreover, among chemical elements there are someones very spread, the latters forming "binary compounds" which specially denominated : e.g. it appears term "oxides" about binary compound's oxygen, nitrides for nitrogen, chlorides for chlorine, etc.


Done, on the basis of "defined proportion or Proust's law" you can assign greeks prefixes for indicate atomic mutual proportions. You finished.





For example, CO2 containts two only chemical elements (e.g. carbon and oxygen) who appears in a finite proportion as 1 : 2 (one to two). Then, you will write "carbon di-oxide".





I hope this helps you.
Reply:Use prefixes only when both elements are non-metals.


Like Carbon dioxide (non-metals)

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