Page 104 - The Periodic Table Book
P. 104
104
Rf Rutherfordium
Transition Metals 104 104 163 Discovery: 1964
State: Solid
Rutherfordium was the first superheavy
element to be discovered. In this type
of element, each atom has 104 or more protons
in its nucleus. It is named after the New Zealand
scientist Ernest Rutherford, who, in 1913,
suggested that every atom has a nucleus, or
core. Pure rutherfordium is synthesized by
Ernest Rutherford researchers in a laboratory.
105
Db Dubnium
105 105 163
The US
scientist Albert
Ghiorso discovered
12 elements State: Solid
Discovery: 1968
in the 20th
century.
It took scientists nearly 30 years to agree on
a name for this element. Dubnium was finally
named after the Russian city of Dubna, where the
first atoms of this artificial, radioactive element
were created, in 1968. However, a team of
American scientists led by Albert Ghiorso also
produced samples of the element at the same
time. This radioactive element has 12 isotopes,
102 Albert Ghiorso or forms, with different numbers of neutrons.
102-103_Rutherfordium_Dubnium_Seaborgium.indd 102 12/12/16 5:39 pm
