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![[Post New]](/templates/default/images/icon_minipost_new.gif) 11 Feb 2008 13:57:12 IST
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why in NH3, N comes first
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11 Feb 2008 13:59:09 IST
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I mean,
Why Ammonia is NH3 and water is H2O? Why not Ammonia is H3N? Why is this difference?
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11 Feb 2008 14:27:46 IST
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in covalent compounds, element with less electro negativity comes first
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11 Feb 2008 14:28:14 IST
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if u like it rate me
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12 Feb 2008 11:16:37 IST
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Rocky sir electronegativity of hydrogen is 2.1; nitrogen is 3; oxygen is 3.5, then why NH3 and H2O. Why not HN3 and H2O?. I am not understanding.
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12 Feb 2008 11:18:58 IST
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because IUPAC says so... i dont think that electronegativity answer is correct..!!
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12 Feb 2008 11:26:36 IST
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Chira19 sir IUPAC is applicable for organic materials only is it not!
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12 Feb 2008 11:32:42 IST
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no dude iupac is applicable everywhere in chemistry
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you are in the competition to beat the competition
you work hard for a desired result |
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12 Feb 2008 11:51:49 IST
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OK ambareesh13 sir, then may I request you to clear my confusion of NH3 and H2O?
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12 Feb 2008 12:04:39 IST
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dude..!!! you are mistaken.... iupac applies for complete naming in chemistry.... its full form says intrnational union of pure n applied chemistry...!!!
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12 Feb 2008 20:28:45 IST
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dude look.........
IN H2O H SHOWS METTALIC BEHAVIOUR AS IT DISSOCIATES TO GIVE H+ JUST LIKE METAL CATIONS SO IN CASE OF HYDROGEN COMPOUNDS U ALLWAYS PLACE HYDROGEN FIRST AS PER CONVENTION THAT METAL FIRST NONMETAL SECOND NOW THIS APPLIES ONLY TO HYDROGEN COMPOUNDS LIKE H2O OR H2S .
IN CASE OF COVALENT BONDED MOLECULES COMAPRE THE METTALIC CHARECTER OF THE INDIVIDUAL UNIT ATOMS WHICH HAS HIGHER METTALIC CHARECTER COMES FIRST EG NF3 NO2
PCL4 OK.
THIS EXPLAINS A PART OF UR QUERRY NOW IN CASE OF NH3 H HERE DOES NOT BEHAVE AS A METAL WOULD IN PLACE OF IT
NOW SEE TAKE NF3 AND NH3 AND COMPARE THEIR BOND ENERGIES , THEN AS U KNOW NF3 IS COVALENT IF U FIND NH3 AND NF3 GIVING U COMPARABLE VALUES THEN SURELY NH3 IS COVALENT AND SO H THERE IS NOT LIKE A METTALIC HYDROGEN SO THERE COMES A DIFFERENCE IM NOT SURE ABT THIS NH3 INVESTIGATE IT I WILL LET U KNOW SOON
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13 Feb 2008 01:51:11 IST
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It is due to some historical reasons.... NH3 was called NH3 long before IUPAC made rules that less electronegetive element should appear first..... It did not feel the need to change the way it is written just to avoid confusion.. NH3 was used in many fields and changing the way it is written may create confusion.. So it is still NH3
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<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>
         
<DIV ALIGN="right">Animated Letters</DIV></TD></TR></TABLE>
"There are either many different universes or many different regions of a single universe, each with its own initial configuration and, perhaps, with its own set of laws of science. In most of these universes the conditions would not be right for the development of complicated organisms; only in the few universes that are like ours would intelligent beings develop and ask the question: "Why is the universe the way we see it?" The answer is then simple: If it had been different, we would not be here!"
From Stephen Hawking's 'Breif History of Time' |
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15 Feb 2008 07:04:49 IST
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n is more eletropositive than h
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<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
<TR><TD>
     
<DIV ALIGN="right">Glitter Graphics</DIV></TD></TR></TABLE>
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15 Feb 2008 20:08:21 IST
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@ sivaramakh
h is more electropositive dont u know it resembles metals and h+ is more stable than h- n is more electronegative
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COPYRIGHT :
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no part of the facts may be reproduced , stored in ur memory , or transmitted by any means without pror written permission from x4
****VIOLATERS ARE LIABLE FOR PROSECUTION UNDER THE " X4 GOIIT ACT 2008 ".**** |
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