A vertical column on the periodic table is called a group or sometimes a family. Elements within the same group share similar ...

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 ...

Education Collections allow us to curate the most relevant online resources related to specific NOVA programs. Use this collection of resources as a source of inspiration for your classroom: find a ...

For the first time, a research team from the University of Cologne has observed the electron capture decay of technetium-98, ...

Neutral Calcium (Ca): 20 protons and 20 electrons. Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s². Calcium Ion (Ca²⁺): 20 ...

Nuclear chemists and nuclear physicists at the University of Cologne provide experimental proof of a long-suspected atomic decay pathway. The article ...

Measurements of an artificial radioactive element called lawrencium could revive an arcane controversy over the element’s position in the periodic table — and the structure of the table itself. An ...

Nuclear chemists and nuclear physicists at the University of Cologne provide experimental proof of a long-suspected atomic decay pathway / The article published in ‘Physical Review’ shows that ...