IB Chemistry HL 11-Chapter 2 (Atomic Theory): What to expect on the test??

[Andy K.]

Okay, my chapter 2 exam is coming up now...

I am just wondering what to expect most on the test, because I heard that there are some concepts in the new IB curriculum that are less important than others.

So far, I have learned: Atom Theory(model theories), Nuclear Reaction, Geologic Dating (Decay), Electromagnetic Spectrum, Continuous Spectrum, Rydberg Calculations, Electron Configuration, Calculation (Wavelength, Period, Frequency), and Ionization Energy.

I have heard that there is more focus on the concept-based subjects which requires explaining, but I want some reassurance. How should I prepare? 

Thanks everyone!

[Msj Chem]

Just so that you know, the use of the Rydberg equation is not required in HL chemistry. 

Have you covered calculating ionization energy and evidence from ionization energies?

If not, you can find videos here:

http://www.msjchem.com/topic-12-atomic-structure-hl.html

[Andy K.]

Wow, your website is very informative! May I use it for future references?

And yes, I should've mentioned Ionization Energy, I forgot  (and I did just study it)

By chance, do you know which sub-topics are the most important to know? 

Thanks!!

 

[Msj Chem]

Feel free to use my website and videos. 

It's hard to say which sub-topic is the most important because it is up to your teacher, who makes the test.

It seems like you covered everything in topic 12. Just make sure that you remember the exceptions to the Aufbau principle (Cu and Cr) and that 4s fills before 3d but 4s electrons are lost first when transition metals form ions.