Periodic Table of Elements

In 1869, Russian chemist Mendeleev arranged elements with similar chemical properties in the same column according to their relative atomic mass, and compiled the first periodic table of elements. With the development of science, the vacancies left by unknown elements in the periodic table are gradually filled. When the mystery of atomic structure was discovered, the arrangement was changed from relative atomic mass to the number of protons (extranuclear electrons or nuclear charges) of the atom, forming the current periodic table of elements. The periodic table of exhibit elements introduces various chemical elements that make up substances to visitors through a combination of models and multimedia. The wall displays 118 elements in the form of acrylic cells, and 81 elements are presented in the form of physical samples, except for radioactive elements. Among them, the five gases helium neon argon krypton xenon emit characteristic colors of light when powered on.

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.