Pls help!! I need the extra credit 1. Atoms form an ion when the amount of which particle charges
2. Which groups tend to form cations?
3. How many total electrons does potassium have when it becomes an ion with its preferred oxidation number?
4. What happens to an atom as it forms an anion?
5. Most atoms form ions to reach stability. What group on the periodic table (name or number) is already stable as neutral atoms? What makes that group already stable?
6. Why do elements in group 15 prefer to form ions with a -3 oxidation number, instead of a +5 oxidation number?