What is the ionic formula for calcium chloride?

The ionic formula for Calcium Chloride is ##CaCl_2##

Calcium is an Alkaline Earth Metal in the second column of . This means that calcium has 2 it readily gives away in order to seek the stability of the octet. This makes calcium a ##Ca^(+2)## cation.

Chlorine is a Halogen in the 17th column or ##p^5## group. Chlorine has 7 . It needs one electron to make it stable at 8 electrons in its valence shells. This makes chlorine a ##Cl^(-1)## anion.

Ionic bonds form when the charges between the metal cation and non-metal anion are equal and opposite. This means that two ##Cl^(-1)## anions will balance with one ##Ca^(+2)## cation.

This makes the formula for calcium chloride, ##CaCl_2##.

I hope this is helpful. SMARTERTEACHER