Answer
The following statements are true:
a). Electrons repel each other
b). Electrons are attracted to protons
d). Electrons are much lighter than neutrons
Work Step by Step
a). Electrons repel each other because like charges repel each other
b). Electrons are attracted to protons because electrons are negatively charged and protons are positively charged and like charges attract to each other
d). An electron's mass is $9.11\times 10^{-28}$ grams while a neutron's mass is $1.67\times 10^{-24}$ grams
