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| This tile identifies the data on the other tiles.  In case it's not obvious, here's a key to the key: 
 | Sym 
 | Atomic Symbol 
 |  | AN 
 | Atomic Number 
 |  | Name 
 | Name (American spellings) 
 |  | AW 
 | Atomic Weight 
 |  | G/CC 
 | Density in grams per cubic centimeter (I don't have small lowercase letters....) Elements that are gases have their density in grams per liter, which is marked on the individual tile.
 
 |  | MP C 
 | Melting point in degrees Centigrade 
 |  | BP C 
 | Boiling point in degrees Centigrade 
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