MarvinSketch supports the following types of generic query atoms:
| Name | Description |
|---|---|
| A | Any atom except hydrogen |
| AH | Any atom including hydrogen |
| Q | Heteroatom (any atom except hydrogen and carbon) |
| QH | Heteroatom or hydrogen (any atom except carbon) |
| M | Metal (contains alkali metals, alkaline earth metals, transition metals, actinides, lanthanides, poor(basic) metals, Ge, Sb, and Po) |
| MH | Metal or hydrogen |
| X | Halogen (F, Cl, Br or I) |
| XH | Halogen or hydrogen |
Generic Query Atoms can be added to a query structure to include a wide range of elements. For a more detailed description of this please see the Query Guide. To add a Generic Query Atom to the molecule, select one of the Generic Query Atom types from the Periodic Table and place it on the canvas.