Periodic Table
Web Elements
By Jason Houpt
1st Hour
Hydrogen
• Hydrogen was discovered by Henry Cavendish
at 1766 in London, England. Origin of name:
from the Greek words "hydro" and "genes"
meaning "water" and "generator".
Sodium
• Sodium was discovered by Sir Humphrey Davy
at 1807 in England. Origin of name: from the
English word "soda" (the origin of the symbol
Na comes from the Latin word "natrium").
Bromine
• Bromine was discovered by Antoine-J. Balard
at 1826 in France. Origin of name: from the
Greek word "bromos" meaning "stench".
Astatine
• Astatine was discovered by Dale Corson,
MacKenzie, Segre at 1940 in California, USA.
Origin of name: from the Greek word
"astatos" meaning "unstable"
Francium
• Francium was discovered by Marguerite Perey
at 1939 in France. Origin of name: named
after "France".
Roentgenium
• Roentgenium was discovered by S. Hofmann, V.
Ninov, F. P. Hessberger, P. Armbruster, H. Folger, G.
Münzenberg, and others at 1994 in Gesellschaft für
Schwerionenforschung (GSI) in Darmstadt,
Germany.. Origin of name: the proposed name
roentgenium has yet ot be accepted formally, but
lies within the long established tradition of naming
elements to honour famous scientists. Wilhelm
Conrad Roentgen discovered X-rays in 1895.
Holmium
• Holmium was discovered by J. L. Soret and
Delafontaine at 1878 in Switzerland. Origin of
name: from the Greek word "Holmia"
meaning "Sweden".
Polonium
• Polonium was discovered by Marie Curie at
1898 in France. Origin of name: named after
"Poland" (birthplace of Marie Curie)
Barium
• Barium was discovered by Sir Humphrey Davy
at 1808 in England. Origin of name: from the
Greek word "barys" meaning "heavy".
Molybdenum
• Molybdenum was discovered by Carl William
Scheele at 1781 in Sweden. Origin of name:
from the Greek word "molybdos" meaning
"lead".
Gallium
• Gallium was discovered by Paul-Emile Lecoq
de Boisbaudran at 1875 in France. Origin of
name: from the Latin word "Gallia" meaning
"France" and perhaps also from the Latin
word "gallus", (the cock, a translation of
Lecoq, the discoverer of gallium).
Actinium
• Actinium was discovered by Andre Debierne
at 1899 in France. Origin of name: from the
Greek word "aktinos" meaning "ray".
Seaborgium
• Seaborgium was discovered by Albert Ghiorso
and others at 1974 in The Lawrence Berkeley
Laboratory in California and the Livermore
National Laboratory, USA.. Origin of name:
Glenn T. "Seaborg", American nuclear chemist
and Nobel prize winner.
Thallium
• Thallium was discovered by Sir William
Crookes at 1861 in England. Origin of name:
from the Greek word "thallos" meaning
"green twig" or green shoot.
Einsteinium
• Einsteinium was discovered by Workers at
Argonne, Los Alamos, USA, and the University
of California at Berkeley, USA. at 1952 in USA.
Origin of name: named after "Albert Einstein".
Hassium
• Hassium was discovered by Peter Armbruster,
Gottfried Münzenber and their co-workers. at
1984 in Gesellschaft für
Schwerionenforschung (GSI) in Darmstadt,
Germany. Origin of name: the origin of the
name is the Latin word "Hassias" meaning
"Hess", the German state.
Potassium
• Potassium was discovered by Sir Humphrey
Davy at 1807 in England. Origin of name: from
the English word "potash" (pot ashes) and the
Arabic word "qali" meaning alkali (the origin
of the symbol K comes from the Latin word
"kalium").
Cadmium
• Cadmium was discovered by Friedrich
Strohmeyer at 1817 in Germany. Origin of
name: somewhat confusingly, from the Latin
word "cadmia" meaning "calamine" (zinc
carbonate, ZnCO3) and from the Greek word
"kadmeia" with the same meaning.
Aluminum
• Aluminum was discovered by Hans Christian
Oersted at 1825 in Denmark. Origin of name:
from the Latin word "alumen" meaning
"alum".
Thulium
• Thulium was discovered by Per Theodore
Cleve at 1879 in Sweden. Origin of name:
named after ""Thule", an ancient name for
Scandinavia.
Zirconium
• Zirconium was discovered by Martin Heinrich
Klaproth at 1789 in Berlin, Germany. Origin of
name: from the Arabic word "zargun"
meaning "gold color".
Lithium
• Lithium was discovered by Johan August Arfvedson
at 1817 in Stockholm, Sweden. Origin of name:
from the Greek word "lithos" meaning "stone",
apparently because it was discovered from a
mineral source whereas the other two common
Group 1 elements, sodium and potassium, were
discovered from plant sources.
Indium
• Indium was discovered by Ferdinand Reich,
Hieronymus Theodor Richter at 1863 in
Germany. Origin of name: named after the
indigo line in its atomic spectrum
Dysprosium
• Dysprosium was discovered by Paul Emile
Lecoq de Boisbaudran at 1886 in France.
Origin of name: from the Greek word
"dysprositos" meaning "hard to obtain".
Gold
• Gold was discovered by Known since ancient
times. at no data in not known. Origin of
name: from the Anglo-Saxon word "gold" (the
origin of the symbol Au is the Latin word
"aurum" meaning "gold").