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Periodic table

what is the atomic number of hydrogen 1
what is atomic number the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
what are Valence Electrons Electrons that are the farthest from the nucleus: help atoms bond with other atoms.
what are Noble Gases Family 18, Do not Bond
what are Halogens Family 17, like to bond with Alkali Metals to Form Salts
what are Rare Earth Elements
what are Transition Metals
Created by: Sebastianlb