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does a proton and an electron have the same mass do a proton and electron have the same mass a proton and an electron have the same mass but opposite charges a proton and an electron have the same mass do neutrons protons and electrons have the same mass a proton and an electron have approximately the same mass do protons and electrons have approximately the same mass do protons and electrons have the same relative mass protons and electrons have the same mass true or false do protons and electrons have equal masses
