An element is defined according to the number of protons contained inside the nucleus of each atom. No two elements have the same number of protons, hence each element has a unique atomic number ...

The table starts with the simplest atom, hydrogen, and then organizes the rest of the elements by atomic number, which is the number of protons each contains.

Scientists have long wondered whether there is a limit to the number of protons and neutrons that can be clustered together to form the nucleus of an atom. A new study comes closer than ever to ...

The new element is radioactive, and while it is in the detector, it gives off alpha particles—two protons and two neutrons—in a predictable fashion.

Nuclear landscape mapped: Number of isotopes allowed by laws of physics calculated Date: June 27, 2012 Source: DOE/Oak Ridge National Laboratory Summary: A supercomputer has calculated the number ...