Monday, February 23, 2009

The key things related to the topics below



Binary Covalent Nomenclature: - A binary covalent compound is a pure substance that consists of two non-metallic elements.

an example would be water which is h2O.



-how to name a binary covalent compound using prefixes such as di or tri.

e.g N2O3 would be dinitrogen trioxide



-how to convert names to formulae

e.g dinitrogen trioxide is N2O3



Cation names and formulas:

- Metallic atoms tend to lose electrons and form cations.



-They usually lose a certain number of electrons to have the same stable electronic configuration as the nearest noble gas.



-The names of monatomic cations always start with the name of the metal, sometimes followed by a Roman numeral to indicate the charge of the ion.



Anion names and formulae

- Nonmetallic atoms tend to gain electrons and form anions.



-nonmetallic atoms form anions in order to get the same number of electrons as the nearest noble gas.



-The monatomic anions are named by adding -ide to the root of the name of the nonmetal that forms the anion.

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