Assembling atoms

The exhibit consists of a 30 inch OLED transparent screen, assembled models, robotic arm devices, cameras, and a "start" button. When unmanned, the transparent screen displays the correct combination of atomic compound molecules in a loop. The exhibit project is in the form of assembling molecular hybrid orbital models, using 9 combinations of props to assemble 4 elements: carbon (C), hydrogen (H), oxygen (O), and sulfur (S) into 6 compound models that can be recognized by the system; There are three types of organic and three types of inorganic substances. Inorganic substances: carbon dioxide CO2, sulfur trioxide SO3, and water H2O; Organic compounds: acetylene C2H2, ethylene C2H4, and methane CH4. Among them, SP type includes carbon dioxide CO2, acetylene C2H2, SP2 type includes sulfur trioxide SO3, ethylene C2H4, and SP3 type includes water H2O and methane CH4. After viewing the compound assembly task on the transparent screen, visitors can freely choose the atomic model of the interactive tabletop and assemble it.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

Hybrid Orbital Theory was proposed by Pauling L et al. in 1931 on the basis of valence bond theory. Essentially, it still belongs to modern valence bond theory, but it enriches and develops modern valence bond theory in terms of bonding ability, molecular spatial configuration, and other aspects. In order to form changes, chemical reactions are usually related to the formation and breaking of chemical bonds. Chemical reactions do not alter the atomic nucleus in any way, but are limited to the interaction of electron clouds outside the atom. A. Two atoms B each have a single electron. When A and B approach each other, the two electrons form an electron pair in a spin opposite manner, meaning that the atomic orbitals where the two electrons are located can overlap with each other. This reduces the energy of the system and forms a chemical bond, where a pair of electrons form a covalent bond.