InThinking is a great organisation. I got my first category training with them and it was one extremely useful to my teaching. In addition, the website is highly in line with the training and the IB curriculum and also very helpful. It is such a blessing...

Dina Sonbol, American International School in Egypt, Egypt

Great resourses and teaching tips. I swear by this site

Katie Woodcock, Sir James Henderson School, Italy

This is an excellent resource for IB chemistry teachers, it is easy to use and navigate your way through.

Sarah Al-Benna, Heidelberg International School, Germany

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Make up a question about the Periodic Table

1 November 2018

To mark the150th. anniversary of the Periodic Table (first proposed by Mendeleev in 1869), IUPAC will be hosting an online quiz during 2019... more

Applying IB chemistry to a diet pill

24 September 2018

One of the reasons why life expectancy is starting to fall in certain parts of the world is the increase in obesity.The number of overweight... more

Subscriber comments

  • 19 Nov Geoffrey Neuss
    Core & AHL
    Hi Dunstan, Thank you for the kind comments, I’m glad you are finding the site so useful. I am currently working on an additional (free) section which covers the whole syllabus specifically for all students of subscribing schools and hope...
  • 19 Nov dunstan chacha
    Core & AHL
    Your work is of world class! I can not compare it with any other I have happened to see.On my mirror I see a competent chemistry teacher,all because of you master.Thanks a lot,May God take care of you always. D. Chacha
  • 18 Nov Geoffrey Neuss
    Periodic trends answers
    Hi Chris, I think the simplistic theory is the one that I have given which usually suffices for the IB. Your application of Coulomb’s law ignores the fact that once an electron is removed there is less electron-electron repulsion forces between...
  • 18 Nov Christopher Holbrook
    Periodic trends answers
    Hello Geoff According to Coulombs Law. Each electron is a discrete point charge and the force of attraction between it and the nucleus will be proportional to the product of the charges (1 x 11 for sodium) and inversely proportional to the...
  • 17 Nov Anthi Kotsiliou
    Topic 1
    Anyway, in their understanding and problem solving, that is the meaning of mole, but the -number one in your list- problem faced by students will be eliminated
  • 17 Nov Geoffrey Neuss
    Topic 1
    Hi Anthi, So for IB exams from May 2023 onwards a mole will be 6.02214076 x 1023 elemental entities? I wonder if the IB will just accept 6.02 x 1023 or whether they will expect students to remember the exact definition? It does make sense though...
  • 17 Nov Anthi Kotsiliou
    Topic 1
    Changes! TOK /NOS material too. Have a nice day
  • 14 Nov Geoffrey Neuss
    Periodic trends answers
    Hello Chris, There are still 11 protons but only ten electrons in the Na ion. This means that the attraction of the 11 protons on the 10 electrons is greater (than 11 protons on 11 electrons in the free atom) so it will 'pull' them closer to...
  • 14 Nov Christopher Holbrook
    Periodic trends answers
    Hello Geoff Not sure I get the answer to 3 (ii). There are still the same number of electrons in the remaining shells. The number of protons is still the same and so the attraction is still the same. The loss of the outer electron surely has...
  • 13 Nov Geoffrey Neuss
    Periodic trends
    Thanks Susanne - I have repaired the link now.
  • 13 Nov Susanne Hirschberg
    Periodic trends
    The link to the periodicity graphing program does not work any more. Second point. It would be very helpful if you had technician's notes on your practical listing the exact chemicals needs and if necessary how to prepare them. Thanks!
  • 12 Nov Geoffrey Neuss
    Hello Cindy, It is a good question and many teachers wonder why students are now required to do both as the skills assessed are very similar. The biggest difference is that no credit is given in the IA for the process whereas this is covered...


Chemistry for the IB Diploma (Oxford IB)

The new edition of the Study Guide (which has sold over 150,000 copies) by Geoffrey Neuss for first exams in 2016.

more info