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Wednesday, January 22, 2014

Naming Compounds

Naming Compounds More Practice With Naming   Before assignment a composite, you switch to figure out what kind of chemical compound it is. We volition consider common chord types:   1. ionic Compounds Without a musical passage Metal.   Ionic compounds argon formed when a alloy gives up its electrons to a non-metal. Basically if the compound contains a metal, it is ionic. But at that place argon different sets of rules for transition metals. A  transition metal is an fixings with an atomic number of 21 to 30, 39 to 48 or 57 to 80.   a.         So for a compound with every a nonher(prenominal) metal, apply these rules:   * The metal ions name does not deepen irrespective of charge * The non-metals name ends in ide.   For example:    AlCl3 = aluminum chloride                         Na2S = sodium sulfide                                 K2O = special K oxide                         MgH2 = magnesium hydride   signalise how the little numbers (subscripts) do not affect the mode we name them.   b.         In going rearward (from name to formula), we depart have more fun. In much(prenominal) a case the append charge of the (+) and (-) ions in the compound has to be ZERO.   Example: What is the reclaim formula for calcium phosphide?   Here, we have to consider the common charges for calcium and phosphorus, which are +2 and -3, respectively. Calcium, if you recall, typically loses both electrons to get a noble gas electron arrangement, and phosphorus needs three more electrons.                                     Ca+2 and P-3                                                 One of each would perform a philia of 2 + (-3) = -1. To get a sum of zero, we need three Ca+2 ions and two P-3 for a total of 3(2)+ 2(-3) = 0.   So the answer is Ca3P! 2.   Other examples:         potassium oxide :          K+1 and O-2  give K2O                                                 aluminum bromide         Al+3 and Br-1 yield AlBr3.   c.         Polyatomic Ions   When metals are bonded to polyatomic ions, which consist of two or...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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