Question Answer
Has no electrical charge Neutron
the center of an atom Nucleus
a group of 2 or more "atoms" joined together Molecule
has a positive electrical charge Proton
organizes all the elements in a table Periodic Table of Elements
has a negative electrical charge Electron
a group of 2 or more "elements" joined together Compound
a pure substance made of only 1 atom Element
the smallest particle of matter Atom




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