Element Infomation
Atomic Numbers 101 through 110

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   This page contains basic information on elements with atomic numbers 101 through 110.  I have tried to enter only correct information, but if you find a mistake, please e-mail me at apurdy@centurytel.net, and I will correct it as soon as possible.

 

Mendelevium             multicolored.gif (1741 bytes)Click here to return to periodic table                    

Symbol Md Name Mendelevium
Atomic Number 101 Atomic Mass (258) amu
Melting Point 827°C Boiling Point no data
Protons/Electrons 101 Neutrons 157
Classification Metal State Solid
Density no data Group Actinoid
Electronegativity 1.3 Atomic Radius no data
# of Isotopes 0 Color no data
Energy Levels 7 Crystal Structure no data
Although mendelevium does not occur in nature, it was discovered in 1955 by Albert Ghiorso, Bernard G. Harvey, Gregory R. Choppin, Stanley G. Thompson, and Glenn T. Seaborg at the University of California in Berkeley as a product resulting from helium-ion bombardment of einsteinium-253.           

Uses -  no known uses

 

Nobelium                   multicolored.gif (1741 bytes)Click here to return to periodic table                      

Symbol No Name Nobelium
Atomic Number 102 Atomic Mass (259) amu
Melting Point 827°C Boiling Point no data
Protons/Electrons 157 Neutrons 157
Classification Metal State Solid
Density no data Group Actinoid
Electronegativity 1.3 Atomic Radius no data
# of Isotopes 0 Color no data
Energy Levels 7 Crystal Structure no data
Nobelium was discovered forst in 1957 by a team working at the Nobel Institute for Physics in Stockholm, Sweden.  It was confirmed in 1959 by Glenn T. Seaborg and others at Berkeley, California.                                                

Uses - no known uses

 

Lawrencium                multicolored.gif (1741 bytes)Click here to return to periodic table                  

Symbol Lr Name Lawrencium
Atomic Number 103 Atomic Mass (260) amu
Melting Point 1627°C Boiling Point no data
Protons/Electrons 103 Neutrons 157
Classification Metal State Solid
Density no data Group Actinoid
Electronegativity no data Atomic Radius no data
# of Isotopes 0 Color no data
Energy Levels 7 Crystal Structure no data
Lawrencium was discovered in 1961 by Albert Ghiorso, Torbjorn Sikkeland, Almon Larsh, and Robert M. Latimer in Berkeley, California when a californium isotope was bombarded with boron ions.

Uses - no known uses

 

Rutherfordium                   multicolored.gif (1741 bytes)Click here to return to periodic table            

Symbol Rf Name Rutherfordium
Atomic Number 104 Atomic Mass (261) amu
Melting Point no data Boiling Point no data
Protons/Electrons 104 Neutrons 157
Classification Transition Metal State Solid
Density no data Period/Group 7 / 4
Electronegativity no data Atomic Radius no data
# of Isotopes 0 Color no data
Energy Levels 7 Crystal Structure no data
Rutherfordium was discovered in 1964 by workers at the Nuclear Institute at Dubna in the USSR and at the University of California at Berkeley.  The element was obtained through high energy collisions of californium-249 and carbon-12.                                                 

Uses - no known uses

 

Dubnium                         multicolored.gif (1741 bytes)Click here to return to periodic table                

Symbol Db Name Dubnium
Atomic Number 105 Atomic Mass (262) amu
Melting Point no data Boiling Point no data
Protons/Electrons 105 Neutrons 157
Classification Transition Metal State Solid
Density no data Period/Group 7 / 5
Electronegativity no data Atomic Radius no data
# of Isotopes 0 Color no data
Energy Levels 7 Crystal Structure no data
Dubnium was discovered in 1967 at the Nuclear Institute at Dubna in the USSR and the University of California at Berkeley.  It was obtained by collisions of californium-249 ions and nitrogen-15 ions.                                                          

Uses - no known uses

 

Seaborgium                     multicolored.gif (1741 bytes)Click here to return to periodic table                 

Symbol Sg Name Seaborgium
Atomic Number 106 Atomic Mass (263) amu
Melting Point no data Boiling Point no data
Protons/Electrons 106 Neutrons 157
Classification Transition Metal State Solid
Density no data Period/Group 7 / 6
Electronegativity no data Atomic Radius no data
# of Isotopes 0 Color no data
Energy Levels 7 Crystal Structure no data
Seaborgium was discovered in 1974 by Albert Ghiorso and co-workers at The Lawrence Berkeley Laboratory in California and the Livermore National Laboratory.  It was obtained by the collision of oxygen-18 ions and californium-249 ions.               
Uses - no known uses

 

Bohrium                          multicolored.gif (1741 bytes)Click here to return to periodic table                  

Symbol Bh Name Bohrium
Atomic Number 107 Atomic Mass (262)
Melting Point no data Boiling Point no data
Protons/Electrons 107 Neutrons 155
Classification Transition Metal State Solid
Density no data Period/Group 7 / 7
Electronegativity no data Atomic Radius no data
# of Isotopes 0 Color no data
Energy Levels 7 Crystal Structure no data
Bohrium was idscovered in 1981 by Peter Armbruster, Gottfried Münzenber and their co-workers at Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany.                              

Uses - no known uses

 

Hassium                           multicolored.gif (1741 bytes)Click here to return to periodic table                 

Symbol Hs Name Hassium
Atomic Number 108 Atomic Mass (265) amu
Melting Point no data Boiling Point no data
Protons/Electrons 108 Neutrons 157
Classification Transition Metal State Solid
Density no data Period/Group 7 / 8
Electronegativity no data Atomic Radius no data
# of Isotopes 0 Color no data
Energy Levels 7 Crystal Structure no data
Hassium was discovered in 1984 by Peter Armbruster, Gottfried Münzenber and co-workers at Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany.                               

Uses -  no known uses

 

Meitnerium                      multicolored.gif (1741 bytes)Click here to return to periodic table               

Symbol Mt Name Meiterium
Atomic Number 109 Atomic Mass (266) amu
Melting Point no data Boiling Point no data
Protons/Electrons 109 Neutrons 157
Classification Transition Metal State Solid
Density no data Period/Group 7 / 9
Electronegativity no data Atomic Radius no data
# of Isotopes 0 Color no data
Energy Levels 7 Crystal Structure no data
Meitnerium was discovered in 1982 by Peter Armbruster, Gottfried Münzenber and co-workers at Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany.  It was produced by fusing an iron-58 isotope and a bismuth-209 isotope together.                  

Uses - no known uses

 

Ununnilium                      multicolored.gif (1741 bytes)Click here to return to periodic table                 

Symbol Uun Name Ununnilium
Atomic Number 110 Atomic Mass (272) amu
Melting Point no data Boiling Point no data
Protons/Electrons 110 Neutrons 162
Classification Transition Metal State Solid
Density no data Period/Group 7 / 10
Electronegativity no data Atomic Radius no data
# of Isotopes 0 Color no data
Energy Levels 7 Crystal Structure no data
Ununnilium was discovered in 1994 by S. Hofmann, V. Ninov, F.P. Hessberger, P. Armbruster, H. Folger, G. Münzenberg, H.J. Schött and others at Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany.  It was produced by fusing a nickel and a lead atom together.               
Uses - no known uses

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