Answer
a. True
b. True
c. True
d. False
Work Step by Step
You can study this at topic 4.3 'The Atom' pages 110 to 113
An atom is composed of 3 subatomic particles (protons and neutrons inside the nucleus, which has most of the mass of an atom and electrons outside the nucleus), two of those particles have opposite charges and are attracted to each other (protons and electrons ).
The subatomic particles can have charge 1+( protons ), 1-( electrons) or 0 ( neutrons), equal charges repel each other, which means an electron repels other electrons and protons repel other protons.
