What Is the Lightest Element on the Periodic Table?

Answer

The lightest element in the periodic table is Hydrogen with one proton in its nucleus and an atomic weight of 1.0079 grams per every mole of atoms. The hydrogen element has atomic number 1 and is represented by the symbol H. It is also the most plentiful chemical element, constituting approximately 75% of the Universe's chemical basic mass.
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The Periodic Table of Elements
Dmitri Mendeleev generally is credited with the creation of the first periodic table, which charts the chemical elements by atomic number and valence shell electron configuration.
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