For each element, a square on the standard periodic table will contain:
The Atomic Number (the integer at the top, which represents the number of protons in the atoms of that element)
The Chemical Symbol of the element (the one or two letter symbol, such as C for Carbon, Mg for magnesium)
The Atomic Mass of the element (the average mass of all naturally occurring isotopes of that element. It's often a decimal number because it's an average, even though it represents the number of protons and neutrons in the atom)Usually, the element's common name is listed, but not all charts do this.
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