What is the chemical formula of calcium chloride?

➷ It would be CaCl2

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Explanation:

Atomic number of calcium is 20 and its electronic configuration is 2, 8, 8, 2. So, to acquire stability it loses 2 valence electrons and hence forms ion.

Whereas atomic number of calcium is 17 and its electronic distribution is 2, 8, 7. To attain stability its needs to gain one electron and hence then it forms ion.

Therefore, when both calcium and chlorine chemically combine together then they will form calcium chloride, that is, .

Thus, we can conclude that the chemical formula of calcium chloride is .

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a