Atomic number

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Atomic number and Mass number of an atom - Science

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case/lang/veirs - "Atomic Number" (Full Album Stream)

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.