Students will practice general patterns related to the periodic trends of ionization energy, atomic radii, atomic mass, and atomic number. Students will consider how the law of conservation of energy ...

The periodic table’s arrangement also allows scientists to discern trends in element properties, including electronegativity, ionization energy, and atomic radius. Many scientists worked on the ...

For example, fluorine, chlorine, or oxygen are highly electronegative and assume relatively small atomic radii in compounds. The bonds are then classified based on how much they resemble each other.

The atomic weight of bromine, for instance, is commonly thought to be 79.904, but it can actually range between 79.901 and 79.907, depending on where the element is found.

Experimental first Conceptual art showing the rare-earth element promethium in a vial surrounded by an organic ligand. (Courtesy: Jacquelyn DeMink, art ... Lanthanide contraction describes the ...

With these elements, the atomic weight of the longest-lived isotope gets listed on the periodic table, according to the International Union of Pure and Applied Chemistry (IUPAC).

A new way of calculating the size of atomic nuclei has helped solve a longstanding problem in nuclear theory. Previously, all so-called ab initio approaches to this problem “under-predicted” the sizes ...

However, the element has some intriguing properties: It is one of the only elements with no known stable form, and it has the largest atomic radius. Some elements on the periodic table are ...

They have a high enough atomic mass but quite a small atomic radius due to well-organized electrons, so in the same volume, you can pack more osmium atoms than any other known element. Osmium has ...