Elements in the periodic table are arranged in order of increasing atomic number. The atomic number represents the number of protons in an atom's nucleus, uniquely identifying each element.

The heaviest element in the Periodic Table, which is Oganesson, has 118 protons. Protons are not elementary particles; they're actually made up of even smaller particles called quarks.

The reactions all conserved baryon number (the total number of protons and neutrons) and electric charge, meaning that this phase began with a 50/50 split between protons and neutrons, with just ...

It says something about Dmitri Mendeleev that he had an easier time keeping track of the number of protons in the nucleus of an atom than the number of brothers and sisters living under his roof ...

All the elements in the Periodic Table are made from different atoms, and the structure of these atoms results in a gamut of phenomena from radioactive decay to nuclear power.

The finding could be put to use at a new facility opening in 2020 that might create new elements—that is, nuclei with more than 118 protons—in addition to new isotopes of the known elements ...

They signaled the decay of element-114 289 (the isotope with 114 protons and 175 neutrons, giving it a mass number of 289) first to element-112 (mass number 285), then element-110 (mass number 281 ...

New atom-by-atom technique demonstrated for the first time with nobelium might ensure that elements at the bottom of the table are grouped correctly ...