Are you up to date?

Breaking news – four new elements have been added to the periodic table. I’m sure chemists are paid to do this by the companies who make period tables to get us to buy new ones. OK, that’s a bad joke. Bad jokes aside, here are some more information about these new elements. The elements added have proton numbers 113, 115, 117, 118. Element 118 would be placed in group 18. This means that the seventh period of the periodic table is now ...

Oxidation States of Vanadium

Here is a great lab to use, whether it with regards to redox (topic 9) or transition metals (topic 13): Vanadium It deals with looking at the oxidation states of vanadium by reducing it with Zinc and the re-oxidising it with MnO4-. There is lots of good teaching to get over in this lab, from understanding redox and writing half equations to seeing that transition metals can have variable oxidation states through the colour of their ions. Please note, as with any lab outlined ...

Topic 3 – Periodicity – Trends in the Atomic Radii

Yesterday I dealt with electronegativity. Once your students are secure in this concept, you will be able to expand upon your teaching of this topic. Section 3.2.2 and 3.2.3 of the syllabus deals specifically with trends both across period 3 and down group 1 and 7. In order to understand the concepts involved, your students will need to be familiar with the electron arrangement in atoms and the concept of shielding (of outer shell electrons by inner shells), as well as the ...

Electrongeativity

To effectively teach topic 3.2 (Physical trends) of the Periodicity unit, you need to introduce the students to the concept of electronegativity. In order to assist your teaching, the following video may help. You should also emphasize to the students that electronegativity is only found in covalent bonding (and not the common misconception, that it is found in all bonds). OgAEnuYKcPg

Periodicity – Topic 3 and 13

This follows on from yesterdays posting - just a couple of ideas for labs work you could carry out when teaching this topic. I should stress that this is only a list of ideas / suggestions and that if you intend using any of these ideas to assess for IA, please ensure that they are given to the students in the appropriate format. Discuss similarities and differences between elements in the same group - this lends itself to a lab on ...

Periodicity: Topic 3 and 13

If you are a May session school, it is very likely that by this point in time you will have finished and you may wish to use it yourself to revise or just share it with your students. It does not cover everything but is a good starting point. To download the powerpoint, click on the file below: pt_trends Many thanks to the website www.ibchem.com for providing this.