It would be one electron in the outermost shell. Hope this helps!
Either protons or neutrons
Explanation:
Physics: The study of matter and energy and the interactions between them. Physicists study such subjects as gravity, light, and time.
The question is a bit confusing but here i go..
Explanation:
here's the answer to your question
double arrow just mean that it's a reversible process, and the reaction can go back and forth.