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The History Of the Periodic Table.  

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The History Of the Periodic Table By 1860 about sixty elements were known and a method was needed for organisation. Many scientists made significant contributions that eventually enabled Dmitri Mendeléev to construct his table. The Periodic Table is based on the properties of matter. We can describe, identify, separate, and classify all the elements by properties. There are two types of property of matter. Physical properties which describe the material as it is and chemical properties which describe how an element reacts, with what it reacts, the amount of heat it produces as it reacts, or any other measurable trait that has to do with the power of the element. The periodic table came about from the idea that we could arrange the elements, originally by atomic weight, in a format that would show similarity among groups. By studying the elements Lithium, Sodium and Potassium, it can be seen that they...

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