Question

number of protons present in O-2 is____​

Answer 1

Hence, the oxygen atom (or ion) has 8 protons. From the periodic table, we discover that the atomic number of the oxygen atom is 8. Hence, the oxygen atom (or ion) has 8 protons. When it gains electrons and becomes an ion, its charge increases.

Answer 2

Answer:

number of electron = number of proton so anser is 4