article_snippet.sent: This has made the element, which can only be generated in particle accelerators, extremely difficult to study.
article_snippet.sent: This makes it one of the heaviest chemical elements detected to date and does not occur naturally.
article_snippet.sent: Instead scientists had to synthesis it in the laboratory by bombarding a film of another heavy element known as americium with calcium ions.
article_snippet.sent: another heavy element known as americium with calcium ions lasted for just a fraction of a second before another heavy element known as americium with calcium ions decaying into more commonly found elements.
article_snippet.sent: Although still to be officially named, another heavy element known as americium with calcium ions has been given the temporary name of ununpentium.
article_snippet.sent: However, scientists have only ever been able to produce minuscule amounts of the substance and the substance has a half life of 27 seconds.
highlights_snippet.sent: The element is extremely difficult to make and has a half life of 27 seconds .
  