Replace Atoms
This action replaces chemical element with other chemical element.
-     Allow valence error on replace: Atom exchange occurs even if it causes valence error on the relevant atom. 
Example :
| Action | Input | Output | 
| Replace Atom N to O |      |      | 
| Replace Atom N to O |      |      | 
Note : Action replaces atoms inside abbreviated groups; the affected group will be ungrouped.
 
             
            