Scales: Open/Ball & Stick 2.5 cm per Angstrom
Closed/semi-space-filling 1.5 cm per Angstrom
Atom-parts: Range from 17 mm to 23 mm diameter
Bonds: Single bonds are represented by medium links (19 mm) and multiple bonds by longer, flexible links (30 mm). For compact models, bonds are represented by short links (2 mm).
Valence: Represented by the number of holes: 1-hole (l); 2-hole (ll); 3-hole (lll); 4-hole (lV); 5-hole (V); 6-hole (Vl)