the number of protons and the number of neutrons determine an element's mass number. :D
The nervous system.
It transports signals from and to different parts of the body and forms actions.
Answer:
man ion even know but u fr struggling today huh?
Explanation:
Its been almost a year since i've been in chemistry, so sorry if its not right. Cs, Ba, Rb, Sr, Xe. I think that the levels of ionozation increase from the bottom left corner of the periodic table and increase as you go up and to the right
