What equation represents the reaction of calcium with chlorine?
- A$\text{2Ca} + \text{Cl} \rightarrow \text{Ca}_2\text{Cl}$
- B$\text{2Ca} + \text{Cl}_2 \rightarrow \text{Ca}_2\text{Cl}_2$
- C$\text{Ca} + \text{Cl} \rightarrow \text{CaCl}$
- D$\text{Ca} + \text{Cl}_2 \rightarrow \text{CaCl}_2$