Answer: I would choose the fourth
Explanation: b/c group 18 on the periodic table have the most stable valence electrons (the # of valence electrons are full and no side outweighs another). At least that’s what my teacher last year said.
Answer:
It's either 2-4, use process of elimination (sorry i could not help more!)
Explanation:
Group 18 is the most stable due to having the max. number of valence electrons that their outer shell can hold.
