Answer:
Because it is made up of different minerals which are chemically combined.
Explanation:
Answer:
C
Explanation:
4Fe+3O2-->2Fe2O3 is the balanced equation.
Calcium ions have a charge of “2+”because they are in group two (column number 2)
Skip over the transition metals
Fluoride ions would have a charge of
“1-” because they are all the way near the end of the table in the second last group (group 7)
Hope that helps :)