Hello and welcome back to the 14th episode of Lexx Education. The comedy podcast where Laura Lexx tries to learn GCSE science from her nerdy younger brother Ron.

This week we are back on the chemistry trail and, it's not just siblings who have bonds: it's atoms too! We look at all types of chemical bonding: ionic, covalent and metallic bonds. There's some time spent on crystal lattice structures, and how things react in solution. There's also a lot of Laura reacting in fury.

Ron accidentally tries out a new catchphrase, there's the return of Don't Just Say Things and the first appearance of the elusive Producer Nephew. Enjoy!

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