Tetraneutronium. (External Sample)
Controversial work has suggested that clusters of four neutrons might just be stable enough to call "element zero", an element with zero protons and zero electrons, just four neutrons. It would be one heck of a strange element if it really exists. New Scientist published this nice "periodic table entry" on the cover of their October 26, 2002 issue, and you can read the article online on their archive site. (It requires a login, which is free for subscribers to the print edition, and they offer a free 7-day trial for non-subscribers.)
Source: New Scientist Magazine
Contributor: Theodore Gray
Acquired: 26 October, 2002
Text Updated: 11 August, 2007
Price: $0
Size: 0"
Purity: 0%
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