The Periodic Table is a well-organized chart that contains all 118 known elements in the universe. These elements are the ...

Scientists use the periodic table to quickly refer to information about an element, like atomic mass and chemical symbol ... Since then, the periodic table has evolved to reflect over 150 years of ...

And today it's a chemistry classic ... periodic table and each letter on it represents a different element. We call these letters symbols. And an element is a pure substance made from only ...