Atom Query Properties

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    Name Description
    .H+ Increases the number of total hydrogens (total number of hydrogen substituents).
    .H- Decreases the number of total hydrogens (total number of hydrogen substituents).
    .v+ Increases the number of valence (total bond order).
    .v- Decreases the number of valence (total bond order).
    .X+ Increases the number of connections (number of substituents including hydrogens).
    .X- Decreases the number of connections (number of substituents including hydrogens).
    .R- Increases the number of rings (number of rings the atom is a member of).
    .R+ Decreases the number of rings (number of rings the atom is a member of).
    .r+ Increases the smallest ring size (size of the smallest ring the atom is a member of).
    .r- Decreases the smallest ring size (size of the smallest ring the atom is a member of).
    .rb+ Increases ring bond count (number of ring bonds next to the atom).
    .rb- Decreases ring bond count (number of ring bonds next to the atom).
    .s+ Increases substitution count (number of non-hydrogen and isotopic hydrogen substituents).
    .s- Decreases substitution count (number of non-hydrogen and isotopic hydrogen substituents).
    .h+ Increases the number of implicit hydrogens (number of implicit hydrogen substituents).
    .h- Decreases the number of implicit hydrogens (number of implicit hydrogen substituents).
    .D+ Increases degree (equivalent to substitution count: number of non-hydrogen and isotopic hydrogen substituents).
    .D- Decreases degree (equivalent to substitution count: number of non-hydrogen and isotopic hydrogen substituents).
    .u Marks as an unsaturated atom (atom has double, triple or aromatic bond).
    .a/A Marks as aromatic/aliphatic (has aromatic bond).