It should be one but if I’m wrong I am so so sorry
Answer: Lithium
Explanation:
Chlorine's high electronegativity causes it to pull electrons from lithium, resulting in the ionic compound LiCl being formed
Technically, the moon doesn't "change" every night.
The shape APPEARS to change.
These are the phases of the moon or "cycle" of the moon if you prefer to call it.
Hope this helps!