Atomic nummer

Frae Wikipedia, the free beuk o knawledge
Jump to navigation Jump to search
An explanation o the superscripts an subscripts seen in atomic nummer notation. Atomic nummer is the nummer o protons, an tharefore an aa the tot positive charge, in the atomic nucleus.

In chemistry an pheesics, the atomic nummer (an aa kent as the proton nummer) is the number o protons foond in the nucleus o an atom an tharefore identical tae the charge nummer o the nucleus. It is conventionally representit bi the seembol Z. The atomic nummer uniquely identifies a chemical element. In an atom o neutral charge, the atomic nummer is an aa equal tae the nummer o electrons.