In this question Q stands for a halogen atom. Magnesium and calcium both make a compound with chlorine and a compound with bromine. One of these compounds includes: • the Group 2 element with the greater first ionisation energy and • the Group 17 element with the greater Q-Q bond energy. What is the formula of this compound?
- A$\text{MgCl}_2$
- B$\text{MgBr}_2$
- C$\text{CaCl}_2$
- D$\text{CaBr}_2$