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Chemical Elements | Symbols | and Atomic Numbers

The history of the discovery and use of the elements began with primitive human societies that discovered native minerals like carbon, sulfur, copper and gold (though the concept of a chemical element was not yet understood). Attempts to classify materials such as these resulted in the concepts of classical elements, alchemy, and various similar theories throughout human history. Much of the modern understanding of elements developed from the work of Dmitri Mendeleev, a Russian chemist who published the first recognizable periodic table in 1869. This table organizes the elements by increasing atomic number into rows ("periods") in which the columns ("groups") share recurring ("periodic") physical and chemical properties. The periodic table summarizes various properties of the elements, allowing chemists to derive relationships between them and to make predictions about compounds and potential new ones.

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Curtis Strite

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βˆ™ 2021-10-07 22:59:23
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Cards in this guide (10)
57

Lanthanum (La)

5/8

Cerium (Ce)

5/9

Praseodymium (Pr)

60

Neodymium (Nd)

55

Cesium (Cs)

54

Xenon (Xe)

53

Iodine (I)

52

Tellurium (Te)

51

Antimony (Sb)

50

Tin (Sn)

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