Difference Between Mendeleev And Modern Periodic Table

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The periodic table is the arrangement of chemical elements according to their chemical and physical properties. The modern periodic table was created after a series of different versions of the periodic table. The Russian Chemist/Professor Dmitri Mendeleev was the first to come up with a structure for the periodic table with columns and rows. This feature is the main building block for the modern periodic table as well. Mendeleev was able to identify that chemical properties of the elements began repeating each time after a certain number of elements. Hence, the term ‘periods’ came into use, resembling this character of repetition. The columns in the periodic table are called groups, and they group together elements with similar properties. The rows in the periodic table are called periods, and they represent sets of elements that get repeated due the possession of similar properties.…show more content…
The basis of Mendeleev’s periodic table was categorizing the elements according to their physical and chemical characteristics with regard to their atomic weights. There were other scientists who…show more content…
The elements Tellurium and Iodine is a good example for this. Mendeleev’s first periodic table had the elements with similar properties grouped in rows. He then released a second version of his periodic table where the elements were grouped in columns numbered l-Vlll, depending on element’s oxidation state. However, Mendeleev’s periodic table didn’t support the existence of the isotopes. They are the atoms of the same element with differing

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