Question

How many protons and electrons are present in O²⁻?a) 8 protons and 8 electrons b) 10 protons and 8 electrons c) 8 protons and 10 electrons d) 16 protons and 8 electrons e) none of the above

Answer 1

c) 8 protons 10 electrons

Because there would usually be 8 of both, but in this case there has to be 2 more electrons to give it the ²⁻ charge