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.
Fixer: no fixer is available for this checker.
Example :
| Rare element Checker ( rareelement) | Warning: | Fix | 
|---|---|---|
| Find Rare element |  ex_rareelement_ch |  no fixer |