How many protons does an atom of copper have?

A copper atom has 29 protons in its nucleus. The number of protons of an atom is equal to the atomic number of the element in the Periodic Table.

Copper's atomic number is 29, so a copper atom contains 29 protons.

Atomic number = number of protons.

It contains 29 electrons,29 protons and 34 neutrons.

As copper is element number 29, it has 29 protons. The proton number is the same as the element number shown in the periodic table.