dmitri mendeleev arranged the periodic table by increasing atomic number.
dmitri mendeleev arranged the periodic table by increasing atomic number.
who arranged the periodic table by increasing atomic number?
dmitri mendeleev
history of the periodic table









































the periodic table is an arrangement of the chemical elements, which are organized on the basis of their atomic numbers, electron configurations and recurring chemical properties. elements are presented in order of increasing atomic number. the standard form of the table consists of a grid with rows called periods and columns called groups.









































the history of the periodic table reflects over two centuries of growth in the understanding of chemical properties, with major contributions made by antoine-laurent de lavoisier, johann wolfgang döbereiner, john newlands, julius lothar meyer, dmitri mendeleev, and glenn t. seaborg.









































section::::early history.
history of the periodic table
following the discovery of the atomic nucleus by ernest rutherford in 1911, it was proposed that the integer count of the nuclear charge is identical to the sequential place of each element in the periodic table. in 1913, henry moseley using x-ray spectroscopy confirmed this proposal experimentally. moseley determined the value of the nuclear charge of each element and showed that mendeleev's ordering actually places the elements in sequential order by nuclear charge. nuclear charge is identical to proton count and determines the value of the atomic number ("z") of each element. using atomic number gives a definitive, integer-based sequence for the elements. moseley predicted, in 1913, that the only elements still missing between aluminium ("z" = 13) and gold ("z" = 79) were "z" = 43, 61, 72, and 75, all of which were later discovered. the atomic number is the absolute definition of an element and gives a factual basis for the ordering of the periodic table. in other words, since the atomic number of an element is the same as the number of protons in its nucleus, the modern periodic table arranges the elements according to their atomic number, and relative to their atomic mass, the way mendeleev did. the periodic table is used to predict the properties of new synthetic elements before they are produced and studied.
periodic table