Elements J and K combine to make compound L. Both J and K are elements in Period 3. J has the smallest atomic radius among the Period 3 elements. In Period 3, only two elements have a melting point below that of K. Which compound might L be?
- A$\text{MgCl}_2$
- B$\text{MgS}$
- C$\text{Na}_2\text{S}$
- D$\text{PCl}_3$