Feature 13D MODEL: This model shows chemical structures, molecular bonds and bond angles in all directions, demonstrating basic molecular geometry, chemical molecular structures and stereochemistry through 3D modelling studies. 2EUDCATIONAL MODEL: This molecular structure model will stimulate children's interest in learning, exercise their hands on skills and expand their spatial imagination. 3TEACHING AID: The model can be used in chemistry textbooks to represent the structure of various molecules of inorganic and organic substances, allowing teachers to explain them more visually. 4EASY TO LEARN: The common standard used for each atomic colour makes it easier for you to use and learn, and can be used to construct a wide range of common and slightly more complex C, H, O and N. 5SIMPLE INSTALLATION: The atoms and chemical bonds are tightly and firmly bonded together and can be easily disassembled with a disconnecting tool.SpecificationItem Type: Molecular Structure ModelMaterial: PPUse: This set of models contains atoms of carbon, hydrogen, oxygen, nitrogen, phosphorus, sulphur, chlorine, bromine and monovalent metals, and allows the construction of ballandstick and scale models of common substances found in secondary school chemistry textbooks such as alkanes, alkenes, alkynes, aromatic hydrocarbons such as benzene, halogenated hydrocarbons, alcohols, ethers, phenols, aldehydes, ketones, carboxylic acids and esters, as well as common inorganic substances. .wang-edit-text{ font-family:'Arial' !important } .wang-edit-text table { border-top: 1px solid 000 border-left: 1px solid 000 } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000 border-right: 1px solid 000 padding: 3px 5px } .wang-edit-text table th { text-align: center }Package List78 x Atom Model30 xProportional Short Bond Model6 xProportional V Bond Model50 x Middle Model18 x Long Bond Model6 x Overlength Bond Model1 x Wrench1 x Storage Box Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.