code: IAtom toCDKAtom(Atom beamAtom, int hCount) {
  
          IAtom cdkAtom = newCDKAtom(beamAtom);
  
          cdkAtom.setImplicitHydrogenCount(hCount);
          cdkAtom.setFormalCharge(beamAtom.charge());
  
          if (beamAtom.isotope() >= 0) cdkAtom.setMassNumber(beamAtom.isotope());
  
          if (beamAtom.aromatic()) cdkAtom.setIsAromatic(true);
  
          if (beamAtom.atomClass() > 0) cdkAtom.setProperty(ATOM_ATOM_MAPPING, beamAtom.atomClass());
  
          return cdkAtom;
      }
docs: Create a new CDK {@link IAtom} from the Beam Atom.
  
  @param beamAtom an Atom from the Beam ChemicalGraph
  @param hCount   hydrogen count for the atom
  @return the CDK atom to have it's properties set