The Periodic Table Epi 02

The Modern Periodic Table consists of 118 elements. The periodic table is arranged based on the atomic number of elements. The first periodic table was created by Russian chemist Dmitri Mendeleev in 1869.

The noble gases were the last group to be added to the periodic table in the 20th century. The only liquid elements on the periodic table are bromine and mercury.

Elements in the same group have similar chemical and physical properties. Technetium is the only element that does not occur naturally on Earth.

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