Which student has the most precise explanation for why calcium chloride's
formula always follows the pattern of CaCl2?
A. Ca gains one electron and Cl lose two
B. We can predict that Ca will lose two electrons and Cl will gain one electron, meaning
two Cl- ions are needed to bond with one Ca2+
C. We can predict that CI will gain two electrons and Ca will lose one electron, meaning
one C12-ion is needed to bond with two Ca+
D. Cl doesn't really "lose" two electrons but shares them with Ca
