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The periodic table, also known as the periodic table of (the) chemical elements, is a tabular display of the chemical elements. It is widely used in chemistry, physics, and other sciences, and is ...

At the middle of the 19th century, 63 chemical elements were known to science. Before Mendeleev’s discovery, attempts at arranging them in some logical way were made by Johann Doebereiner (1829), ...

THIS book may be viewed in two aspects—as a body of information and as a narrative. As a body of information it is very comprehensive. In no other work dealing with the periodic law, so far as the ...