ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Periodic table in 18-column layout. This table includes all 118 known elements as of May 2017, with the most recent additions and final symbols as confirmed by the IUPAC: Elements 113 Nihonium (Nh), 115 Moscovium (Mc), 117 Tennessin (Ts) and 118 Oganesson (Og). Elements with so far unknown chemical properties are shown in grey.
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