Rare Element
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Checker searches for rare elements in the structures. Atoms generally present in organic compounds are: H, Li, Na, K, Mg, Ca, B, C, N, O, F, Cl, Br, I, Al, P, S, Cr, Mn, Fe, Co, Ni, Cu, Zn. Any elements outside this selection are considered rare elements.
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Fixer: no fixer is available for this checker.
 
Example :
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         Rare element Checker (rareelement)  | 
                
         Warning:  | 
                
         Fix  | 
        
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         Find Rare element  | 
                
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