Iron(III) oxide, Fe2O3\text{Fe}_2\text{O}_3Fe2O3, is an ionic compound.
The atomic number of iron is 26.
What is the electronic configuration of the iron ion in iron(III) oxide?
1s22s22p63s23p63d34s21s^2 2s^2 2p^6 3s^2 3p^6 3d^3 4s^21s22s22p63s23p63d34s2
1s22s22p63s23p63d61s^2 2s^2 2p^6 3s^2 3p^6 3d^61s22s22p63s23p63d6
1s22s22p63s23p63d51s^2 2s^2 2p^6 3s^2 3p^6 3d^51s22s22p63s23p63d5
1s22s22p63s23p63d44s11s^2 2s^2 2p^6 3s^2 3p^6 3d^4 4s^11s22s22p63s23p63d44s1
Practise Edexcel GCSE Chemistry Ionic bonding with exam-style questions for Foundation and Higher tier. 42 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.