plutonium

neptunium$\longleftarrow$ 94 $\longrightarrow$americium

Pronunciation

• enPR: plo͞otō'nēəm, IPA ^(key): /pluːˈtoʊniəm/

• Audio (US)

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• Hyphenation: plu‧to‧ni‧um

Noun

Singular plutonium

Plural none

1. (uncountable) Plutonium is a man-made element of the periodic table, with atomic number 94 and symbol Pu.

   Along with neptunium, plutonium was the first man-made element to be created by bombarding uranium-238 cores with neutrons.

2. (uncountable) Plutonium is also the radioactive metal made of plutonium atoms.

   Plutonium is a silvery and very dense metal, its toxicity makes it dangerous to manipulate.