What is the Atomic Number on the Periodic Table?
The atomic number is the number of protons in an atom's nucleus and is unique to each element!
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Atomic number = number of protons. Easy peasy.
It's that little number you see above the element symbol on the periodic table. For example, Hydrogen has an atomic number of 1.
Think of it as the element's ID number. Sodium? That's #11. It's that simple.
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