Answer:
Electronegativity is probably the biggest thing that plays into reactivity. Therefore, since fluorine has a higher electronegativity than chlorine, fluorine is more reactive.
Explanation:
I got it right
B) land cools off much faster than water (creating a air region of high density above land and lower density above sea)
it is C it splits atoms
(A) Mg²⁺ and O²⁻