Answer
a) True
b) True
c) True
d) False
Work Step by Step
PART A: This is a true statement because the charge of the proton and the electron are equal in magnitude but opposite in sign so that when the two particles are paired, the charges sum to zero.
PART B: This is a true statement because opposite charges attract each other, whereas like charges repel each other.
PART C: This is a true statement because the mass of a neutron is $1.67 x 10^{-27}$ kg, whereas the mass of an electron is $9.11 x 10^{-31}$ kg.
PART D: This is a false statement because both the proton and the neutron have nearly the same mass.
