<u> electrical energy to chemical energy</u>
That's a ionic compound because it has a metal and polyatomic parts within the chemical formula.
I can try.
Whats the question
<h3>
<u>ANSWER</u> </h3>
4. O²-
<h3>
<u>EXPLANATION</u> </h3>
O²- has 16 electrons while Ne has 18 electrons. O²- is a molecule that has one electron added to each atom, meaning that there are two extra electrons which makes O²- the same electron configuration as of Ne atom.