The Halogens

Topic 3.2 of the periodic table deals with periodic trends. In particular, under the applications and skills section, we are told to 'discuss the similarities and differences in the properties of elements in the same group, with reference to the halogens (group 17).' In this month’s blog, I thought I would share with you my way of teaching this particular aspect of the course. It goes without saying that the halogens are toxic, poisonous and in general pretty nasty. You the teacher ...

Top Tips for Success (3)

Read the question - it may seem like an obvious thing to say but make sure you do this. Think! What is the question asking me. A question that English speakers (if you are taking your exam in English) seem to get wrong is along the lines of: Cl2 + 2Br- --> 2Cl- + Br2 What is the oxidising agent? English speakers see the word 'oxidising' and immediately think oxidation. The substance being oxidised is Br- and they write this as their answer - but ...