Period Table of Elements

QUICK REFERENCE Symbol: Og Atomic Number: 118 Atomic Weight: [294] Element Classification: Noble Gas Discovered By: Joint Institute for Nuclear Research (Dubna, Russia) and Lawrence Livermore National Laboratory (California, USA) Discovery Date: 2002 Name Origin: Named after Yuri Oganessian, a prominent Russian nuclear physicist who contributed to the discovery of superheavy elements Density(g/cc): Estimated to […] More

QUICK REFERENCE Symbol: Ts Atomic Number: 117 Atomic Weight: [294] Element Classification: Halogen Discovered By: Joint Institute for Nuclear Research (Dubna, Russia) and Oak Ridge National Laboratory (Tennessee, USA) Discovery Date: 2010 Name Origin: Named after the state of Tennessee, reflecting the collaboration with Oak Ridge National Laboratory Density(g/cc): Estimated to be around 7.2 (predicted) […] More

QUICK REFERENCE Symbol: Lv Atomic Number: 116 Atomic Weight: [293] Element Classification: Post-transition Metal Discovered By: Joint Institute for Nuclear Research (Dubna, Russia) and Lawrence Livermore National Laboratory (California, USA) Discovery Date: 2000 Name Origin: Named after the Lawrence Livermore National Laboratory and the city of Livermore, California Density(g/cc): Estimated to be around 12.9 (predicted) […] More

QUICK REFERENCE Symbol: Mc Atomic Number: 115 Atomic Weight: [290] Element Classification: Post-transition Metal Discovered By: Joint Institute for Nuclear Research (Dubna, Russia) and Lawrence Livermore National Laboratory (California, USA) Discovery Date: 2003 Name Origin: Named after the Moscow Oblast, where the Joint Institute for Nuclear Research is located Density(g/cc): Estimated to be around 13.5 […] More

QUICK REFERENCE Symbol: Fl Atomic Number: 114 Atomic Weight: [289] Element Classification: Post-transition Metal Discovered By: Joint Institute for Nuclear Research (Dubna, Russia) and Lawrence Livermore National Laboratory (California, USA) Discovery Date: 1998 Name Origin: Named after the Flerov Laboratory of Nuclear Reactions where superheavy elements are studied, itself named after Soviet physicist Georgy Flyorov […] More

QUICK REFERENCE Symbol: Nh Atomic Number: 113 Atomic Weight: [286] Element Classification: Post-transition Metal Discovered By: Joint team from RIKEN (The Institute of Physical and Chemical Research) in Japan, and the Joint Institute for Nuclear Research in Dubna, Russia Discovery Date: 2004 Name Origin: Named after the Japanese word ‘Nihon’, meaning Japan Density(g/cc): Estimated to […] More

QUICK REFERENCE Symbol: Cn Atomic Number: 112 Atomic Weight: [285] Element Classification: Transition Metal, though it exhibits properties of a noble gas Discovered By: Society for Heavy Ion Research (GSI) in Darmstadt, Germany Discovery Date: 1996 Name Origin: Named after Nicolaus Copernicus, the Renaissance astronomer who proposed the heliocentric model of the solar system Density(g/cc): […] More

QUICK REFERENCE Symbol: Rg Atomic Number: 111 Atomic Weight: [282] Element Classification: Transition Metal Discovered By: Society for Heavy Ion Research (GSI) in Darmstadt, Germany Discovery Date: 1994 Name Origin: Named after Wilhelm Conrad Röntgen, the discoverer of X-rays Density(g/cc): Estimated to be around 28.7 (predicted) Melting Point: Unknown Boiling Point: Unknown Appearance: Presumed to […] More

Darmstadtium, an element with the symbol Ds and atomic number 110, is one of the most fascinating and least understood members of the periodic table. This superheavy element is named after the city of Darmstadt, Germany, where it was first synthesized. As part of the transactinide series, darmstadtium lies in the d-block of the periodic […] More

QUICK REFERENCE Symbol: Mt Atomic Number: 109 Atomic Weight: [278] Element Classification: Transition Metal, though its exact classification is uncertain due to its radioactive nature and limited experiments. Discovered By: Peter Armbruster, Gottfried Münzenberg, and the team at the Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany Discovery Date: 1982 Name Origin: Named after Lise Meitner, […] More

QUICK REFERENCE Symbol: Hs Atomic Number: 108 Atomic Weight: [269] Element Classification: Transition Metal Discovered By: Peter Armbruster, Gottfried Münzenberg, and the team at the Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany Discovery Date: 1984 Name Origin: Named after the German state of Hesse (Latin: “Hassias”), where the discovering laboratory is located Density(g/cc): Estimated to […] More

QUICK REFERENCE Symbol: Bh Atomic Number: 107 Atomic Weight: [270] Element Classification: Transition Metal Discovered By: Peter Armbruster, Gottfried Münzenberg, and their team at the Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany Discovery Date: 1981 Name Origin: Named after Niels Bohr, the Danish physicist who made foundational contributions to understanding atomic structure and quantum theory […] More