The question is a bit tricky. There are no calcium atoms in chloride.

Here's why:

* Chloride refers to the chloride ion (Cl-), a negatively charged atom.

* Calcium is a positively charged ion (Ca2+).

Calcium and chloride come together to form calcium chloride (CaCl2), a compound with two chloride ions for every calcium ion.

Therefore, in calcium chloride, there is one calcium atom per molecule.