Element Wanted: Plutonium

Radioactive and very dangerous.

Date of Birth

Plutonium was first produced in 1940 by Glenn Seaborg, Edwin McMillan, Joseph Kennedy, and Arthur Wahl. It was the second synthetic transuranium element of the actinide series to be discovered.

Physical Description

  • Symbol: Pu
  • Color/Appearance: The metal has a silvery appearance and takes on a yellow tarnish when slightly oxidized.
  • Melting point: 639.4 c, 912.5 c
  • Boiling point: 3230 c, 3503 c
  • Atomic number: 94 Atomic mass: 244
  • Group 6, period 9, radioactive rare metals
  • 94 protons, 94 electrons, 150 neutrons

Related Gangs or Family Members

  • Uranium

Last Seen

  • Nuclear reactors
  • Nuclear weapons
  • specific spacecrafts and satellites


  • Plutonium is named after the dwarf planet Pluto. It followed the trend set by uranium and neptunium of being named for planets in order of distance from the sun, starting with Uranus.

Likely Whereabouts

  • Plutonium Dioxide (PuO2)
  • Plutonium carbide (PuC)
  • Plutonium Dicarbide (PuC2)
  • Diplutonium Tricarbide (Pu2C3)
  • Plutonium Triflouride (PuF3)
  • Plutonium Tetraflouride (PuF4)
  • Plutonium Nitrates [Pu(NO3)4] and [Pu(NO3)3]

Other Information

  • Plutonium is highly radioactive but can only harm you if inhaled or swallowed.
  • The half life of plutonium is over 24,000 years.


$4,000.0 per gram of plutonium.