Background
The periodic table was created in 1869 by Dmitri Mendeleev, a Russian chemist and inventor. With 65 elements at that time on the periodic table, the table was organized so that the elements were sorted in rows as well as columns based on their characteristics. There are also many families on the periodic table, including the Noble Gases, the Alkali family, and the Oxygen family. Nearly 150 years after Mendeleev's brilliant table, scientists still continue to discover new elements. Currently, the periodic table has 118 elements, all categorized under 10 different families. Today, the periodic table is used by scientists and schools around the world to help with chemistry and the learning experience. It organizes all elements on a neat and convenient table, and makes it easy for people to find elements needed for science.
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By: Catherine Tang