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Apr20-11, 02:59 PM   #1
 

table salt


Is the combination of an positive sodium with a negative chlorine neutral ?
If so, what attracts and holds together other sodiums and chlorines to make a grain of salt ?
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Apr20-11, 03:14 PM   #2
 
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In the crystal lattice each sodium ion is surrounded by six chloride ions, each chloride ion is surrounded by six sodium ions - and they all attract each other.

http://departments.kings.edu/chemlab...tion/nacl.html
Apr20-11, 03:36 PM   #3
 
This picture should explain it
http://www.chemistry.wustl.edu/~edud...mages/nacl.jpg
NaCl doesn't exist as just one Na+ ion bonded to just one Cl- ion. Its millions of Na+ cations and Cl- anions ionically bonded to form a lattice like that.
Apr21-11, 02:10 AM   #4
 
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table salt


Even though a hypothetical molecule NaCl is neutral, it has a strong dipole moment and higher multipole moments which lead to a strong attraction of the molecules which can serve as an alternative explanation of how the crystal is formed.
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