Based on the syllabus, I have learned about the atomic structure, deeper into the electronic configuration as well as ionisation energies. Knowing that electron shells have different subshells inside them made me realise that chemistry is now more complex than what we have learned in the past two years and it will be even more complicated in the future ahead.

    2. Which part that you need to learn more?

I think that I have to practice more in formulating shortened electronic configurations. 

1. I’ve learned a lot of things this chapter, such as the atomic structure of atoms, their charges, relative mass, isotopes and the different extent of deflection each subatomic particle will experience. I’ve also learned that the electron configuration is more complicated than what we’ve learned in IGCSE and there are principal quantum shells, subshells (s, p, d, f) and atomic orbitals. I’ve also learned that there are trends across the period (smaller radius as it goes from left to right) and down the group (larger radius). And there are factors causing that (shielding effect, nuclear charge, distance of valence electrons from nucleus, attraction, etc), as well as the 4 factors that affects the ionisation energy of elements. 

2. I probably need to revise more on writing down the electron configuration as there are elements following an exception rule (Such as Copper and Chromium) and revise more about the spin-pair repulsion because elements with spin pair repulsion have lower first ionization energy due to the first electron being easier to be removed. 

However, I still have to improve on explaining the patterns in ionisation energies in the periodic table.

Examples of electron configuration 

Ionisation Energy 

that is what i learnt in chapter 1. Improvements i can make, applications of ionization energies because in practice worksheets i still have a hard time understanding.