Last year, the International Union of Pure and Applied Chemistry (Iupac) revised the atomic weights of gadolinium, lutetium ...

Asteroid 33 Polyhymnia is at the center of an exciting new study that suggests it may hold elements that have never been ...

The team of physicists from The University of Arizona say they were motivated by the possibility of Compact Ultradense ...

Why do the atomic weights on the periodic table keep changing? Kit Chapman meets the team behind the decimal places ...

Some elements have more than one stable (nonradioactive) isotope —variants of the same substance, but with different numbers of neutrons in their atomic nuclei that alter the mass.

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.

How heavy can an element be? An international team of researchers has found that ancient stars were capable of producing elements with atomic masses greater than 260, heavier than any element on ...

For example, sulfur is commonly known to have a standard atomic weight of 32.065, but its real atomic weight can be anywhere between 32.059 and 32.076, depending on where the element is found.

This table includes all 118 known elements, providing their names, symbols, and atomic numbers. Image Source: yourdictionary.com Classification of Elements of Periodic Table Elements are grouped ...