|CDX Constant Name:||kCDXProp_Atom_AtomNumber|
|CDX Constant Value:||0x0439|
|Property of objects:||kCDXObj_Node|
|First written/read in:||ChemDraw 7.0|
Atom number, as text.
ChemDraw is extremely flexible in what it allows for atom numbers: any string is valid, and this property is not limited to numeric values. For example, not only is "2" a valid atom number, but so are 2', 2a, b, and b'.
If this property is absent:
The node does not have an atom number.