Standard atomic weights, those numbers emblazoned under the elements on the periodic table, were once thought of as unchanging constants of nature. But researchers have tweaked the atomic weights of ...

At 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, they ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Nineteen elements on the periodic table — including gold, cadmium, arsenic and aluminum — are getting their atomic weights adjusted. The International Union of Pure and Applied Chemistry (IUPAC) ...

Scientists at Berkeley Lab have used a titanium beam to make atoms of element 116. Not only does this represent a new way to make the super rare element, but it stands as a proof-of-concept that they ...

Why does changing just one proton in the nucleus of an atom create a different element? The number of protons in an atomic ...

Some of the elements used by living systems are far more abundant in Cassiopeia A than we thought, hinting that some parts of ...