Periodic Table | How to read the info | Intro | Atomic Number | Relative Atomic Mass
Atomic Number and Mass Number | Chemistry | Fuse School
Atomic number and Mass number of an atom - Science
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.