Our Concept of the Chemical Element Modified by Study of Radio-Active Change. Skip to main content. Scientific American. August 2, 1919. 5 min read. What is a Chemical Element?

Can you name everything from Ac to Zr? Test your knowledge of the periodic table and see if you can top the leaderboard ...

One such element is Promethium, and a new study from scientists at Oak Ridge National Laboratory has successfully analyzed chemical properties of the rare earth metal some 80 years after its ...

Jadarite—commonly known as kryptonite due to its chemical similarity to the mineral bane of Superman—has only every been ...

The noble gases are the chemical elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore ...

Each element is distinguished by the number of protons, neutrons and electrons that it possesses. The atoms of each chemical element have a defining and same number of protons and electrons, but – ...

Chemical Physics. D. Ugarte, "Curling and closure of graphitic networks under electron-beam irradiation," Nature, 359:707-9, 1992. Daniel Ugarte (Laboratörio Nacional de Luz Síncrotron, Campinas, ...

Instead, they may be made of naturally occurring "superheavy elements" beyond those listed in the periodic table — our current best catalog of 118 chemical elements — new research suggests.

The chemical analyses were conducted by Professor Emeritus and expert in archaeometry, Kaare Lund Rasmussen from the Department of Physics, Chemistry, and Pharmacy, University of Southern Denmark.