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Periodic Table

Presentations | English

The periodic table is a scientifically classified list of elements. The periodic table, similarly known as the periodic table of components, is a table presentation of chemical elements arranged by atomic number, electron configuration, and recurring chemical properties. The pattern of the table indicates periodic trends. The seven rows of tables, called tables, usually have metals on the left and nonmetals on the right. Columns called groups contain components with similar chemical properties. Six groups adopted names and designated numbers: for example, group 17 elements were halogens; Group 18 is the ideal gases. Also displayed are four reasonable rectangular areas or blocks correlated with the filling of different atomic orbits. The elements were scientifically classified in this way in 1869 by the Russian chemist Dmitry Mendeleev. Mendeleev envisioned the periodic table as an array of elements with the same properties. Greek philosophers developed the concept of the four classical elements. This was in line with the Indian Panchabhuta doctrine. They believed that matter was a different combination of fire, air, water, and earth. But this was rejected with the discovery of the original elements. Lavoisier (1770-89) compiled a list of ‌33 elements in different categories: metals, non-metals, gases, and earth. But many of the elements in his categorized list were later proven to be composites. In 1828, Jons Jakob Berzelius compiled a table of atomic weights for particle weights and used symbols for the elements. The list was revised in 1829 by Johann Döbereiner, who applied the Trinitarian theory. He named similar elements the Triads and paved the way for the first innovation of the group. The list was revised again in 1864 by John Newlands, who applied the octave theory. The idea of ​​periodicity was supported. Mendeleev and Meyer-1869 are the implementers of the modern periodic table.

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Lumens

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Lumens

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Periodic Table

Presentations | English