If the number of electrons in an atom is 8 and the number of protons is also 8, then (i) what is the atomic number of the atom? And (ii) what is the charge on the atom?

(a) Atomic number is equal to the number of protons in one atom. Since this atom contains 8 orotons, so the atomic is 8

(b) This atom contains an equal number of positively charged and negatively charged electrons (8 each), so it has no overall charge. That is, the charge on this atom is 0 (zero).