US$ 29.99
packaged in a hard plastic case with standard-size pieces
Sixty-five-piece molecular model set with 32 atoms and 33 bonds for demonstrating bonding angles
Hand-cranked to convert mechanical work into electrostatic energy
Base-mounted 2-stroke diesel engine model in aluminum and plastic
and laboratory procedures
Graphite Crystal Lattice Model Kit Physics_Heat & Thermodynamics packaged in a hard plasticGraphite lattice kit whose atoms and connecting rods assemble into planar carbon sheets, showing the hexagonal bonding within each layer and the weak bonding between layers.