Answer
(a) False
(b) True
(c) False
(d) True
Work Step by Step
(a) False- Mass of protons(1.00728 amu) 1.00 is almost identical to that of neutrons(1.00867 amu).
(b) True- charge of electrons is -1, charge of protons is +1
(c) False- neutral atoms have equal amount of protons and electrons.
(d) True- +1 charge of protons
