Calculate the maximum number of electrons in the third, or M, shell.
8. The number of protons in the nucleus of every atom of any element is
constant and provides an identification called the atomic number. In an
electrically balanced atom, as shown below,
the number of protons equals the number of electrons; therefore, the number
of electrons can also be used to determine the atomic number.
The atomic number of an atom is equal to the number of ________________
in the nucleus.