Element 117 (temporarily, "ununseptium") has been [url=http://www.scientificamerican.com/article/superheavy-element-117-island-of-stability/]in the news lately,[/url] and it will have to be given a permanent name eventually. As members of the Bungie community, I believe it is our solemn duty to ensure that this element is named after the person most strongly associated with the number 117 - Master Chief Petty Officer John-117. If fictional entities like Thor, Prometheus, and France can all have elements named after them, then I assert that so can Master Chief. An element named after Sierra 117 would surely aid in Bungie's ultimate quest for world domination.
Possible names for the element could include:
Johnium (J)
Chiefium (Ch)
Haloium (Hl, not to be confused with halonium ions)
Spartanium (Sp, suggested by Old Hag)
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Or Halomium, with symbol MC (like tin has Sn, lead Pb)