Answer:
PLEASE MARK AS BRAINLIEST!!
Explanation:
Calcium has an atomic number of 20 and an atomic mass of 40
The mass number of an isotope is the sum of the number of protons and neutrons in the atomic nucleus. The atomic number is the number of protons. The calcium-40 isotope has a mass number of 40 , and an atomic number of 20 , therefore it has 20 protons.
I think it would be because of the heat. (Swelling from the sun being on them for so long.) Hope I helped! :)
Displacement reaction
Because Al goes to SO4 and
Cu goes from SO4 to Cu
This happens because Al is more reactive (higher up in the reactivity series) than Cu
Plate is in the process of splitting into two tectonic plates
A) The techtonic plates are moving apart