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Elementary Episodes

    Nitrogen

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

    Silicon

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

    Uranium

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

    Sodium

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

    Carbon

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

    Iron

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

    Hydrogen

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

    Helium

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

    Gold

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

    Oxygen

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