Answer:
1) atomic number is the same. Both, chlorine atom and anion, have atomic number 17. They have 17 protons in nucleus of an atom.
2) both are the same element.
Explanation:
It it important because it makes people wonder how things work and are made which makes it so they want to move forward with experiments <span />
Because the older cells will not be able to function properly without the new cells taking over them. :)
