Features Multifunctional: This silicon dioxide molecular model can be used for demonstration of teaching content on molecular structure in secondary schools, to improve students' spatial concept and facilitate understanding of molecule structure. Wide Application This molecular structure model of silicon dioxide is widely used and can be used in schools, laboratories, etc. Excellent plastic material: this silicon dioxide molecular structure model is made of excellent plastic material, sturdy and wear-resistant, not easy to damage and has a long service life. Good Distinction This molecular model of silicon dioxide has different sizes and atomic colors for different elements, making it easy to distinguish them. Detachable The atoms and chemical bonds of this model of silicon dioxide molecular structure are closely related and can be easily removed with a disconnect tool. Specification: Item Type: Silicon Dioxide Model Material: plastic. Instructions: The crystal structure of silicon dioxide is an atomic crystal, each silicon atom is surrounded by four oxygen atoms arranged in tetrahedrons, oxygen at the top of the tetrahedron, tetrahedra are connected to each other by oxygen atoms. Package list: 40 x silicon atom 30 x oxygen atom 80 x single chemical bond 1 x storage box Package List 40 x Silicon Atom 30 x Oxygen Atom 80 x Single Chemical Bond 1 x Storage Box