(Z, proton number)
(number of protons in an atomic nucleus)
An element's atomic number (or proton number, typically
symbolized as Z) is the number of protons in its nucleus, a number
unique to each element. This number determines how many electrons
orbit within neutral atom of the element, which, in turn, is a major
determinant of the element's chemical properties.
Chemistry's periodic table of the elements lays them out by
atomic number in such manner that some similarities in their
chemical properties correspond to their column.
Referenced by pages:
valley of beta stability