For this question, Q stands for a halogen atom. Magnesium and calcium each make one compound with chlorine and one compound with bromine. One of the compounds has: • the Group 2 element with the greater first ionisation energy and • the Group 17 element with the larger Q-Q bond energy. What formula does this compound have?
- A$\text{MgCl}_2$
- B$\text{MgBr}_2$
- C$\text{CaCl}_2$
- D$\text{CaBr}_2$