Answer:
The ionic formula for Calcium Chloride is
C
a
C
l
2
Calcium is an Alkaline Earth Metal in the second column of the periodic table. This means that calcium has 2 valence electrons it readily gives away in order to seek the stability of the octet. This makes calcium a
C
a
+
2
cation.
Chlorine is a Halogen in the 17th column or
p
5
group.
Chlorine has 7 valence electrons. It needs one electron to make it stable at 8 electrons in its valence shells. This makes chlorine a
C
l
−
1
anion.
Ionic bonds form when the charges between the metal cation and non-metal anion are equal and opposite. This means that two
C
l
−
1
anions will balance with one
C
a
+
2
cation.
This makes the formula for calcium chloride,
C
a
C
l
2
.
I hope this is helpful.
