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Sofja Murphy

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Periodic table

How are elements grouped in the periodic table?
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ITguy565
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he periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods

reference : https://www.livescience.com/25300-periodic-table.html
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Bill Prew

A pretty good description of the organization here:



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thanks