* Calcium is a metal, and it tends to lose two electrons to achieve a stable electron configuration. This results in a positively charged calcium ion (Ca²⁺).
* Chlorine is a nonmetal, and it tends to gain one electron to achieve a stable electron configuration. This results in a negatively charged chloride ion (Cl⁻).
* The strong electrostatic attraction between the positively charged calcium ion and the negatively charged chloride ions forms the ionic bond.
Therefore, the compound formed between calcium and chlorine is calcium chloride (CaCl₂).
