I am sorry, I am not good in this area but, I found a site that could help you: http://www.chemicalelements.com/elements/ca.html
I know I am not supposed to post links but, I found help
In order to make the proton gradient, protons are pumped across the mitochondrial membrane at several points in the electron transport chain. However, that proton gradient is only used to make ATP by the ATP synthase, which is technically separate from the electron transport chain.
Answer:
population is number of inhabitants in area or place
It does not include a gas phase; although small amounts of phosphoric acid (H3PO4) may make their way into the atmosphere, contributing—in some cases—to acid rain
