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 ( replaceatoms:queryatom=N:replaceatom=O) |  Replace atoms input |  Replace atoms output | 
| Replace Atom N to O ( replaceatoms:queryatom=N:replaceatom=O:allowValenceError=true) |  Replace atoms input |  Replace atoms output 2 | 
Note : Action replaces atoms inside abbreviated groups; the affected group will be ungrouped.