BF3 (boron trifluoride) is a molecule representative of trigonal planar geometry & is roughly 300mm (12") along any 2 arms of the molecule when constructed with Unit models.
The atoms in this VSEPR Large Classroom Model set can assume any geometry. Go to the bottom of page Unit Molecular Models for an overview or click on the Instructions/Safety tab to see videos on how to construct any molecular geometry.
Compare this to the model from the smaller Orbit Basic VSEPR theory set; the same structure is only 50mm (2") along any 2 arms of the molecule.
|69150-60||Unit Blue Plastic Bond, 60mm||4|
|69150-80||Unit Blue Plastic Bond, 80mm||18|
|69388C||Atom, Unit, 25mm, white (hydrogen)||4|
|69390C||Atom, Unit, 45mm, blue (nitrogen)||1|
|69391C||Atom, Unit, 45mm, red (oxygen)||2|
|69392C||Atom, Unit, 45mm, black (carbon)||3|
|69393C||Atom, Unit, 45mm, green (halogen)||16|
|69395C||Atom, Unit, 45mm, yellow (sulfur)||2|
|69400||Unit Bond Pegs: 72 pieces: (36 tetra; 24 radial;12 polar)||1|