The lead isotope known as lead-208 was considered a “double magic” atom because of its subatomic ... which explains why these elements are so stable. More stable isotopes can also be ...

An experiment bludgeoning special lead atoms with high-speed particles ... for our understanding of the formation of heavy ...

The “lead” of a pencil is actually made of a substance called graphite which is made of carbon atoms. The picture shows a close-up of one carbon atom. A hydrogen atom has one proton as the nucleus and ...