<span>The biogeochemical cycle that has the least activity because its essential element is mostly stored in rock is the phosphorus cycle. Phosphorus, unlike the other essential elements, is commonly found as a solid. This is why the atmosphere does not play a role in this cycle. Instead, phosphorus remains on land, and is mostly found in rocks and minerals.</span>
C2H6 is a chemical compound
214.0560
+ 9.3456
=223.4016
Answer:(3)
Explanation: 2Al+3H2SO4----->Al(2SO4)3+3H2
B. When electrons gain energy, they have the power to move up to a higher energy level in an atom.
