In Group 2 of the Periodic Table, radium lies beneath barium. Which equation represents the result when solid radium nitrate, $\text{Ra(NO}_3)_2$, is heated strongly?
- A$\text{Ra(NO}_3)_2(s) \rightarrow \text{RaO}(s) + \text{N}_2\text{O}(g) + 2\text{O}_2(g)$
- B$2\text{Ra(NO}_3)_2(s) \rightarrow 2\text{RaO}(s) + 2\text{N}_2(g) + 5\text{O}_2(g)$
- C$2\text{Ra(NO}_3)_2(s) \rightarrow 2\text{RaO}(s) + 4\text{NO}_2(g) + \text{O}_2(g)$
- D$4\text{Ra(NO}_3)_2(s) \rightarrow 2\text{Ra}_2\text{O}(s) + 8\text{NO}_2(g) + 3\text{O}_2(g)$