67.0 Should be th3 answer
Answer:
Copper turns green on exposure to air
Explanation:
Liquid water freezes to form ice: Physical change
Reason: Water can melt back when it becomes ice.
Copper turns green on exposure to air: Chemical change
Reason: The copper can not change back from the green state when it turns green.
A. Protons neutrons and electrons.
Haha those three make up a simple Atom.
Because the older cells will not be able to function properly without the new cells taking over them. :)
