| History |
On December 20, 1994, scientists at GSI Darmstadt, Germany
announced they had detected three atoms of a new element
with 111 protons and 161 neutrons. This element was made
by bombarding 83Bi with 28Ni. Signals of Element 111 appeared
for less than 0.002 s, then decayed into lighter elements including
Element 268109 and Element 264107. These isotopes
had not previously been observed. In 2004 IUPAC approved
the name roentgenium for Element 111. Roentgenium is expected
to have properties similar to gold. |
