Board Thread:Off Topic/@comment-25406802-20180604062110/@comment-29646689-20180605230355

Technically the element Strontium already has the symbol of Sr. but it's fine.

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Neutronium

Properties: metallic. nuff said.

Density: 15.2 (pretty dense)

Melting point: 2030 C

Boiling point: nobody bothered to record it.

Use: for combination with iron and other elements to creates the alloys durasteel, quadranium, and beskar. All alloys (and this element) are copyrighted by LucasArts Disney.

Universe: Star Wars.