The discovery of element 117 filled the last remaining gap in the periodic table as we know it. ... standard periodic tables display the two 14-element series in a separate block at the bottom.) ...

More recently, element 114 sat on the periodic table for 14 years before earning the name flerovium. The researchers will publish their findings in the Aug. 27 edition of the journal Physical ...

The elements that make up each column of the periodic table share a set of common traits. Here, a chemist describes group 15 and the crucial role they play in life.

His table leaves a hole under yttrium and has three 15-element rows in an f-block floating beneath the main table. Nor is he so constrained by atomic numbers. For instance, element 164 is followed ...

Science Classrooms Across the Nation (WHTM) — February 7 is National Periodic Table Day, when we celebrate the efforts of scientists over the centuries to figure out how different elements are ...

History of Periodic Table of Elements. Johann Dobereiner, a German chemist, was the first to consider trends among element properties in the early 1800s.

A t the far end of the periodic table is a realm where nothing is quite as it should be. The elements here, starting at atomic number 104 (rutherfordium), have never been found in nature. In fact ...

The first 117 elements on the periodic table were relatively normal. Then along came element 118. Oganesson, named for Russian physicist Yuri Oganessian (SN: 1/21/17, p. 16), is the heaviest ...

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Browse a list of curated classroom activities by the American Association of Chemistry Teachers. Lesson Plans: The Periodic Table and Bonding Download inquiry-based lesson plans and activity sheets to ...