The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of an atom. It is identical to the charge number of the nucleus. The atomic number uniquely identifies a chemical element. In an uncharged atom, the atomic number is also equal to the number of electrons.

W0lf93. energy flows from the producer level to the consumer level.