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A description of how to write the name for CaCl2 (Calcium chloride). First we determine whether CaCl2 is an ionic or molecular (covalent) compound using the periodic table. From the periodic table Ca is a metal and Cl is a nonmetal.Therefore CaCl2 is an ionic compound since it consists of a metal and nonmetal.Since CaCl2 is an ionic compound we name CaCl2 using the name for the metal (Ca) directly from the periodic table and then changing the element name Chlorine to Chloride.Therefor the name for CaCl2 is Calcium Chloride.ince CaCl2 is an ionic compound we name CaCl2 using the name for the metal (Ca) directly from the periodic table and then changing the element name Chlorine to Chloride. Therefor the name for CaCl2 is Calcium Chloride.
Why is calcium oxide CaO but calcium chloride is CaCl2? in calcium chloride each calcium atom needs to lose two electrons but each chlorine atom needs to gain only one electron. This means that two chlorine atoms react with every o â¦ ne calcium atom to form calcium chloride. So the formula for calcium chloride is CaCl2. ca = proton number is 20 so the structure would be 2, 8 ,8 ,2 cl = proton number is 17 so the structure would be 2 , 8,7 To make it stable calcium has to lose 2 electrons and chlorine has to gain an electron.