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Mendeleev’s best periodic table on Google Play. A new way of learning chemistry. Chemistry is the science of substances, their properties, structure and transformations that derive from chemical reactions, as well as the laws that regulate these transformations. All substances are composed of atoms, which are capable of forming molecules due to their chemical bonds. Chemistry deals mainly with these interactions at the atomic-molecular level, that is, at the level of chemical elements and their compounds. The periodic system of chemical elements (Mendeleev’s periodic table) is a classification of chemical elements which establishes the dependence of various properties of elements on the charge of the atomic nucleus. The system is a graphical representation of the periodic law established by the Russian chemist Dmitri Mendeleev in 1869. Its initial version was developed by Dmitri Mendeleev in 1869-1871 and established that the properties of the elements depended on their atomic mass.

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