Atom properties

Select an atom and open Properties. It shows the Label, Charge, Isotope and Hydrogens, the Query atom settings for substructure searches, and Shape at this atom with the steric number, AXE class, geometry, hybridization and ideal angle.

Select one atom with Select (V), or move to it with Alt+. and press Enter. Properties shows that atom.

Properties for the carbon of chloromethane: Label, Charge, Isotope, Hydrogens, the query atom settings and Shape at this atom.Properties for the carbon of chloromethane: Label, Charge, Isotope, Hydrogens, the query atom settings and Shape at this atom.

The atom

Setting Does
Label The element or label
Charge The formal charge
Isotope The mass number, blank for the natural element. See isotopes
Hydrogens The implicit hydrogen count

Query atom

For finding a structure as a substructure, an atom can match more than itself:

Setting Matches
Query atom Element, or a broader choice
Ring In a ring, not in one, or Any
Aromatic Aromatic, not, or Any
H count A number of hydrogens, or any
Connections A number of neighbors, or Any

Pattern says in words what the atom will match, for example "This atom is itself".

Shape at this atom

Athanor works out the VSEPR shape at the atom:

  • Steric number, for example 4 (4 bonds + 0 lone pairs);
  • AXE class, such as AX4E0;
  • Electron geometry and Molecular geometry, such as tetrahedral;
  • Hybridization, such as sp3, and the Ideal angle, such as 109.5°.

Show orbitals draws the atom's orbitals. See visualize orbitals.

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Last updated Nov 12, 2026