500-Piece Teacher Molecular Model Set

This 500-piece teacher molecular model set contains 230 atoms and 270 bonds for building a wide variety of molecular structures. The set includes carbon (black, 4-hole), oxygen (red, in 1-, 2-, and 4-hole configurations), metal (gray, in 2-, 3-, and 6-hole configurations), hydrogen (white, 1-hole), sulfur (yellow, 4-hole), nitrogen (blue, 3-hole), and phosphorus (purple, in 3- and 4-hole configurations). Bond types include 170 medium bonds and 100 long flexible bonds for representing single, double, and delocalized bonds. The large atom count allows construction of complex organic molecules, coordination compounds, and crystal lattice structures. Designed for teacher demonstrations and advanced student use. Supplied in a heavy-duty storage box.