Ca+Cl2

The reaction between calcium (Ca) and chlorine gas (Cl₂) is a classic example of a combination reaction where a metal reacts with a non-metal to form an ionic compound. The balanced chemical equation for this reaction is as follows:

\[ \text{Ca} + \text{Cl}_2 \rightarrow \text{CaCl}_2 \]

In this reaction, one atom of calcium reacts with one molecule of chlorine gas to produce one formula unit of calcium chloride (CaCl₂). Calcium chloride is an ionic compound consisting of calcium ions (Ca²⁺) and chloride ions (Cl⁻).

In terms of stoichiometry, for every one mole of calcium used, one mole of chlorine gas (which consists of two moles of chlorine atoms) is required to produce one mole of calcium chloride.

If you have any specific questions about this reaction or related concepts, feel free to ask!