Alright I've put together a couple questions I remember from the exam and the answers, put through your questions or answers you dont agree with!
1.) chromium ion, 1s2 2s2 2p6 3s2 3p6 3d3
2.)aluminium 1s2 2s2 2p6 3s2 3p1
which ion has the same structure as krypton with a 2+ charge- strontium
which compound has a ion with 2+ from argon and 3- from argon- Ca3P2
bromine mass spectrum- 50% at 158 and 50% at 162
5 marks on bromine and magnesium
6 marks on practical
find average titre value and use this to find moles of MHCO3 reacted- 0.102 conc of hcl 250cm3 in 25cm3 amounts. something .7 and the moles are 0.041
rmm is 149