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First broadcast in 1998. Gold has malleability, ductility and resistance to corrosion

26 Jun 1998,·13 mins

First broadcast in 1998. Oxygen is the most abundant element on Earth

26 Jun 1998,·14 mins

First broadcast in 1998. Helium is colourless, odourless, tasteless and non-toxic

29 Jul 1998,·13 mins

First broadcast in 1998. Hydrogen is the lightest element on the periodic table

17 Aug 1998,·13 mins

First broadcast in 1998. Iron forms the Earth's inner and outer core

20 Aug 1998,·14 mins

First broadcast in 1998. Carbon is the second most abundant element in the human body

31 Aug 1998,·13 mins

First broadcast in 1998. Uranium has a high atomic weight and is more dense than lead

01 Sep 1998,·14 mins

First broadcast in 1998. Sodium is a soft metal but highly reactive

01 Sep 1998,·15 mins

First broadcast in 1998. Silicon is used in items from breast implants to computers

28 Sep 1998,·13 mins

First broadcast in 1998. Nitrogen forms approximately 78% of Earth's atmosphere

01 Oct 1998,·14 mins