Nucleus, This part of the atom contains protons and neutrons., Mass number, # protons + # neutrons, Neutron, A subatomic particle with no charge (zero)., Atomic mass, The average mass of all the isotopes of an element., Neutrons, # of _________ = Mass # - Atomic #, Proton, A subatomic particle with a positive charge., Electrons, In a neutral atom, # of protons = # of _________, atomic number, This number equals the number of protons and determines an element’s identity., Electron, A subatomic particle with a negative charge., Protons, # of __________ = Atomic #.

Atomic Structure Crossword

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