First broadcast in 1998. Uranium has a high atomic weight and is more dense than lead Read more
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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
Silicon
First broadcast in 1998. Silicon is used in items from breast implants to computers
Nitrogen
First broadcast in 1998. Nitrogen forms approximately 78% of Earth's atmosphere
