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Atomic number
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Atomic Number, Mass Number, and Net Charge
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Periodic Table | How to read the info | Intro | Atomic Number | Relative Atomic Mass
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Atomic Number and Mass Number | Chemistry | Fuse School
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Atomic number and Mass number of an atom - Science
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Understanding Atomic Number and Atomic Mass
The atomic number or proton number of a chemical element is the number of protons found in the nucleus of an atom. It is identical to the charge number of the nucleus. The atomic number uniquely identifies a chemical element. In an uncharged atom, the atomic number is also equal to the number of electrons.
History
Chemical properties
New elements