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Chimie cls a IX a

 
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rookye

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Post Posted: 07-12-2010, 10:14:16 | Translate post to: ... (Click for more languages)

Tema la chimie - : Se dau elementele : P gr V perioada a 3 a , S gr a VI per 3, Mg Gr II per 3 , K gr I per 4 sa se realizeze toate legaturile chimice posibile

(covalente)

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Froster

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Post Posted: 14-12-2010, 22:02:57 | Translate post to: ... (Click for more languages)

poi e evident ca MG si K accepta electroni iar P si S cedeaza electroni, atunci legaturile evidente sunt:

MG3P2, MGS, PK3 si K2S.



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Malpraxxiss

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Post Posted: 15-12-2010, 01:46:23 | Translate post to: ... (Click for more languages)

Froster wrote:
poi e evident ca MG si K accepta electroni iar P si S cedeaza electroni, atunci legaturile evidente sunt:

MG3P2, MGS, PK3 si K2S.


Well, nu mai tin bine cum sta toata treaba asta cu valente, orbitali, legaturi etc., insa cum ramane cu faptul ca sulful si fosforul pot avea si alte valente decat -2 respectiv -3, (vezi H2SO4, H3PO4)

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