We don’t often see chemistry appearing in popular science, so it’s great that the Royal Society of Chemistry has built a a collection of 5 minute podcasts on each of the chemical elements, forming an audio periodic table. You can look over the whole table and click on element to hear a podcast (or read a transcript).
There is also a second, more open-ended series on compounds. Both element and compound series feature a range of podcasts by our editor, Brian Clegg. Here, for example, is his podcast on DNA.