elsolel 
not hard, also, not NaCl.
You'd need another size atom.
Posted on 2/23/17 1:15 PM

eddierox 
12:36
Posted on 5/7/13 5:05 PM

nasia 
16.31
Posted on 9/27/10 11:38 AM

gabry52 
18.41
Posted on 7/11/10 6:45 PM

jawa 
ı thınk as somethıng wrong
Posted on 4/12/10 4:10 PM

lisa-star 
How could this be NaCl. Structure doesn't fit at all.
Posted on 5/23/09 8:47 PM

luweewu 
Pretty easy to find a starting point even if you don't pay attention to the chemistry. Once you've found the starting point, it almost sloves itself.
Posted on 6/28/08 5:57 AM

enidrob 
very good
Posted on 6/10/08 1:29 AM

paradiznik 
I kind of like Chemistry. PS: Biology is much much much much much WORSE!!!
Posted on 6/8/08 3:58 PM

ahunter 
Guess I missed chemistry class so I have no idea what it is, but it was fun to solve.
Posted on 6/7/08 3:44 AM

aaanniiaaa 
NaCl - have You ever been at school?
Posted on 6/6/08 7:46 PM

matthewpincott 
totally wrong it has a Fcc structure
Posted on 6/5/08 10:06 AM

magicwoodster 
Helps if you know the crystaline structure of salt. Then it is just a matter of finding a starting point. Nice.
Posted on 6/3/08 7:49 PM

scorpsine 
very nice
Posted on 6/3/08 4:51 PM