What is the Atomic Number in the Periodic Table?
The atomic number is the number of protons in an element's nucleus. It's usually shown above the element symbol on the Periodic Table.
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It's just the number of protons.
In the Periodic Table, the atomic number tells you how many protons are in the nucleus of an atom. Super important number!
I once memorized the first 20 elements by their atomic numbers. It's the number on top of the element symbol, showing how many protons it has.
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