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subtomic particles


molecule 2 or more atoms that are bonded together (a combination of elements)
compound a type of molecule (2 or more elements)
matter anything or an object with mass
atomic mass is the average mass of an element
protons make the atomic number (make elements)
atoms basic particles of matter
elements even smaller parts of an atom (can't be broken down any further) building blocks of density
atomic number the number of protons in the nucleous of the atom
Created by: rootytooty02