Answer:

: A notable event was the identification of incorrectly drawn chemical bonds in three structures. While some schools provided extra time to account for invigilators explaining the error, others did not, sparking significant post-exam discussion.

If you got the Born-Haber cycle wrong but correctly calculated lattice energy from your numbers, you still received 2 out of 3 calculation marks. Always show your working.

in a gas mixture using mole fractions. This involved calculating moles from mass and then applying Dalton’s Law (