Abstract In 1797, the French chemist Vauquelin hypothesized through chemical analysis experiments that there was a new unknown metal element in the Siberian red lead mines. In 1798, Vauquelin successfully extracted chromium based on his accumulated analytical experience, which confirmed the existence of chromium and initially formed the concept of chromium. In 1803, after Dalton's scientific atomic theory, the concept of chromium was developed into a general term for atoms with an atomic weight of 24. Since the 20th century, with the establishment of atomic structure theory and the rise of isotope chemistry, scientists discovered a total of 27 chromium isotopes. Thus, the modern concept of chromium was formed: the general term for a class of atoms with a nuclear charge of 24. In short, with the development of scientific thoughts and scientific methods, the concept of chromium is also evolving.
DA Xuan, YUAN Zhen-Dong. From Crocoite to Chromium Isotopes: The Discovery of Chromium Element and Its Conceptual Development[J]. Chinese Journal of Chemical Education, 2024, 45(20): 123-128.
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