Chemistry · Oct / Nov 2023 · Paper 11 · Question 5

A student makes three statements. 1 Calcium ions have a 2+ charge and oxide ions have a 2– charge. 2 Magnesium ions and oxide ions have the same electronic configuration as neon. 3 Calcium ions have three full electron shells and magnesium ions have two full electron shells. Which statements are correct?

1. A1, 2 and 3
2. B1 and 2 only
3. C1 and 3 only
4. D2 and 3 only

As printed in the paper