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In 1864 Newlands published his version of the periodic table and proposed the Law of Octaves (by analogy with the seven intervals of the musical scale). This law stated that any given element will exhibit analogous behaviour to the eighth element following it in the table.
Later in 1869, while writing a textbook on systematic inorganic chemistry, Principles of Chemistry, the Russian scientist Dimitri Mendeleev organized materials in terms of the families of the known elements which displayed similar properties and arranged the elements on a table in order of ascending atomic weight grouping elements of similar properties together. Thus the periodic table was born. From this table, Mendeleev developed his statement of the famous periodic law "The physical and chemical properties of elements are periodic functions of their atomic weights". The law was however modified to replace the words 'atomic weights' with 'atomic numbers' in the modern form of the periodic table that is widely used and appreciated today.
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