Elements
BBC World Service
Categories: Science & Medicine
Listen to the last episode:
In the final programme in our Elements series, Justin Rowlatt looks at the rarest and oddest members of the periodic table.
Selenium, bismuth, molybdenum, antimony, rhenium, hafnium, zirconium, tellurium, thallium, barium. What are they? And what are they used for?
Minor metals merchant Anthony Lipmann explains how he made a fortune tracking down a stockpile of one toxic element sufficient to kill millions of people - and sold it to Japanese camera manufacturers.
We set chemistry professor Andrea Sella a musical challenge to round off his elucidation of the periodic table, going out with a pyrotechnic bang.
And cosmologist Martin Rees explains why 85% of the matter in the universe isn't made up of chemical elements at all, but instead of "dark matter", whatever that is.
(Picture: Elements series planning board; Credit: Laurence Knight/BBC)
Previous episodes
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66 - Obscure Elements Wed, 28 Sep 2016
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65 - Gold (Au) Wed, 21 Sep 2016
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64 - Thorium (Th) Fri, 16 Sep 2016
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62 - Platinum group (Pt, Pd, Ru, Rh, Os, Ir) Wed, 07 Sep 2016
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61 - Arsenic (As) Wed, 31 Aug 2016
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60 - Silver (Ag) Wed, 24 Aug 2016
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59 - Iodine (I) Wed, 17 Aug 2016
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58 - Hydrogen (H) - fusion Tue, 31 May 2016
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57 - Cadmium (Cd) Wed, 25 May 2016
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56 - Potassium (K) Wed, 18 May 2016
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55 - Hydrogen (H) - energy Tue, 10 May 2016
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54 - Zinc (Zn) Wed, 04 May 2016
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53 - Hydrogen (H) - water (part 2) Wed, 27 Apr 2016
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52 - Hydrogen (H) - water (part 1) Wed, 20 Apr 2016
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51 - Noble Gases (Ar, Ne, Kr, Xe) Wed, 23 Mar 2016
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50 - Germanium (Ge) Wed, 16 Mar 2016
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49 - Radioactives (Po, Ra, Rn) Wed, 09 Mar 2016
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48 - Tantalum & Niobium (Ta, Nb) Wed, 02 Mar 2016
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47 - Beryllium (Be) Thu, 22 Oct 2015
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46 - Magnesium (Mg) Wed, 30 Sep 2015
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45 - Titanium (Ti) - catalysts Wed, 16 Sep 2015
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44 - Hydrogen (H) - acids Wed, 19 Aug 2015
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43 - Oxygen (O) - industrial uses Wed, 12 Aug 2015
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42 - Titanium (Ti) - materials Wed, 05 Aug 2015
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41 - Oxygen (O) - oxidation Wed, 29 Jul 2015
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40 - Cobalt (Co) Wed, 22 Jul 2015
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39 - Copper (Cu) - electricity Thu, 25 Jun 2015
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38 - Copper (Cu) - materials Wed, 17 Jun 2015
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37 - Boron (B) Thu, 11 Jun 2015
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36 - Gallium & Indium (Ga, In) Wed, 03 Jun 2015
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35 - Iron (Fe) - industrialisation Wed, 01 Apr 2015
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34 - Iron & Manganese (Fe, Mn) - steel-making Wed, 25 Mar 2015
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33 - Iron (Fe) - the Industrial Revolution Wed, 18 Mar 2015
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32 - Technetium (Tc) Wed, 11 Mar 2015
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31 - Fluorine (F) Wed, 04 Mar 2015
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30 - Chromium (Cr) Thu, 26 Feb 2015
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29 - Nickel & Rhenium (Ni, Re) Wed, 18 Feb 2015
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28 - Uranium (U) Wed, 08 Oct 2014
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27 - Lead (Pb) Wed, 01 Oct 2014
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26 - Caesium (Cs) Wed, 24 Sep 2014
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25 - Bromine (Br) Wed, 17 Sep 2014
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24 - Plutonium (Pu) Thu, 11 Sep 2014
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23 - Silicon (Si) - solar Mon, 18 Aug 2014
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22 - Silicon (Si) - chips Thu, 31 Jul 2014
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21 - Sulphur (S) Wed, 30 Jul 2014
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20 - Tungsten (W) Tue, 29 Jul 2014
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19 - Vanadium (V) Mon, 28 Jul 2014
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18 - Nitrogen (N) - fertilisers Sun, 27 Jul 2014
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17 - Nitrogen (N) - explosives Sat, 26 Jul 2014
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16 - Carbon (C) - plastics Fri, 25 Jul 2014