4.94 Indicate if each of the following statements is true or false: (4.3) a. The neutron has no net charges. b. Most of the mass of an atom is due to the protons and electrons. c. The total charge of the electrons is equal, but opposite, to the charge of the nucleus. d. The proton and the electron have about the same mass. e. The mass number is the number of protons. 4.10

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