This is a scientific table that shows chemical elements and how they are arranged by atomic mass, with rows of elements called periods and a column of elements, called a group. This table was invented in 1869 by Dimitri Mendeleev, a Russian chemist, and is used to predict how an element will respond to chemical reactions. This makes it much easier for students and professionals to learn important information about elements quickly, such as whether they can conduct electricity or not.
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