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QUICK REFERENCE Symbol: Sg Atomic Number: 106 Atomic Weight: [269] Element Classification: Transition Metal Discovered By: Lawrence Berkeley National Laboratory team Discovery Date: 1974 Name Origin: Named after Glenn T. Seaborg, a Nobel laureate and pioneer in nuclear chemistry Density(g/cc): Estimated to be around 35.0 (predicted) Melting Point: Unknown Boiling Point: Unknown Appearance: Presumed to […] More

QUICK REFERENCE Symbol: Db Atomic Number: 105 Atomic Weight: [268] Element Classification: Transition Metal Discovered By: Joint Institute for Nuclear Research (Dubna, Russia) and Lawrence Berkeley National Laboratory (Berkeley, USA) Discovery Date: Competing claims in the late 1960s and early 1970s Name Origin: Named after the city of Dubna, Russia, home to the Joint Institute […] More

QUICK REFERENCE Symbol: Rf Atomic Number: 104 Atomic Weight: [267] Element Classification: Transition Metal Discovered By: Joint Institute for Nuclear Research (Dubna, Russia) and Lawrence Berkeley National Laboratory (Berkeley, USA) Discovery Date: Claimed in 1964 by Dubna and in 1969 by Berkeley Name Origin: Named after Ernest Rutherford, the New Zealand-born physicist known for his […] More

QUICK REFERENCE Symbol: Lr Atomic Number: 103 Atomic Weight: [266] Element Classification: Actinide Discovered By: Lawrence Berkeley National Laboratory team led by Albert Ghiorso Discovery Date: 1961 Name Origin: Named after Ernest O. Lawrence, inventor of the cyclotron Density(g/cc): Estimated to be around 15.6 (predicted) Melting Point: 1627°C (estimated) Boiling Point: Not determined Appearance: Presumed […] More

QUICK REFERENCE Symbol: No Atomic Number: 102 Atomic Weight: [259] Element Classification: Actinide Discovered By: Joint Institute for Nuclear Research (Dubna) and Lawrence Berkeley National Laboratory Discovery Date: Claimed in 1957 by Swedish scientists; conclusively identified in 1966 Name Origin: Named after Alfred Nobel, the inventor of dynamite and founder of the Nobel Prize Density(g/cc): […] More

QUICK REFERENCE Symbol: Md Atomic Number: 101 Atomic Weight: [258] Element Classification: Actinide Discovered By: Albert Ghiorso, Glenn T. Seaborg, Bernard G. Harvey, Gregory R. Choppin, and Stanley G. Thompson Discovery Date: 1955 Name Origin: Named after Dmitri Mendeleev, the creator of the periodic table Density(g/cc): Not well determined; estimated around 10.3 (predicted) Melting Point: […] More

QUICK REFERENCE Symbol: Fm Atomic Number: 100 Atomic Weight: [257] Element Classification: Actinide Discovered By: Albert Ghiorso and the Lawrence Berkeley National Laboratory team Discovery Date: 1952 Name Origin: Named after Enrico Fermi, renowned physicist Density(g/cc): Not well determined; estimated around 9.7 Melting Point: 1527°C (estimated) Boiling Point: Not determined Appearance: Presumed to be a […] More

QUICK REFERENCE Symbol: Es Atomic Number: 99 Atomic Weight: [252] Element Classification: Actinide Discovered By: Albert Ghiorso and the Lawrence Berkeley National Laboratory team Discovery Date: 1952 Name Origin: Named after Albert Einstein Density(g/cc): 8.84 (estimated) Melting Point: 860°C (estimated) Boiling Point: Not determined Appearance: Silver-colored, radioactive metal (appearance is theoretical due to its extreme […] More

QUICK REFERENCE Symbol: Cf Atomic Number: 98 Atomic Weight: [251] Element Classification: Actinide Discovered By: Lawrence Berkeley National Laboratory team Discovery Date: 1950 Name Origin: Named after the state of California and the University of California, Berkeley Density(g/cc): 15.1 Melting Point: 900°C Boiling Point: 1740°C (estimated) Appearance: Silvery-white, radioactive metal Atomic Radius(pm): 186 (estimated) Discovery […] More

QUICK REFERENCE Symbol: Bk Atomic Number: 97 Atomic Weight: [247] Element Classification: Actinide Discovered By: Lawrence Berkeley National Laboratory team Discovery Date: 1949 Name Origin: Named after Berkeley, California, the city where it was discovered, also home to the University of California, Berkeley Density(g/cc): 14.78 (estimated) Melting Point: 986°C Boiling Point: Not accurately known; estimated […] More

QUICK REFERENCE Symbol: Cm Atomic Number: 96 Atomic Weight: [247] Element Classification: Actinide Discovered By: Glenn T. Seaborg, Ralph A. James, and Albert Ghiorso Discovery Date: 1944 Name Origin: Named after Marie Curie and Pierre Curie, pioneers in the study of radioactivity Density(g/cc): 13.51 Melting Point: 1345°C Boiling Point: 3110°C (estimated) Appearance: Silvery metallic, radioactive […] More

QUICK REFERENCE Symbol: Am Atomic Number: 95 Atomic Weight: [243] Element Classification: Actinide Discovered By: Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, and Albert Ghiorso Discovery Date: 1944 Name Origin: Named after America, as it is a synthetic element that was discovered in the United States Density(g/cc): 13.69 Melting Point: 1176°C Boiling Point: […] More