How do you find the atomic weight on the periodic table?

Answer 1

On many Periodic Tables, the small number directly below the chemical symbol is the Atomic Mass. On mine, there is a small 12.011 under the large C for carbon. While most carbon is 12, there are naturally occurring carbon13 and carbon14, so this is an average mass of all naturally occurring isotopes, with the majority of isotopes being carbon12

Answer 2

The atomic weight of an element on the Periodic Table is typically found below the element's symbol. It is usually a decimal number that represents the average atomic mass of all the isotopes of that element found in nature. It is also known as the atomic mass.