The element with 82 protons is lead. Lead also has 82 as an atomic number and 82 electrons. The number of protons is equal to the number of electrons in a neutral atom.
Only lead has 82 protons. Each element has a unique number of protons called the atomic number. Any change in the number of protons changes the element.
Changing the number of electrons of an atom creates an atom with a charge. The charged atom is called an ion.
Lead has 125 neutrons. Changing the number of neutrons of an atom creates atoms with a different mass. The differently massed atom is called an isotope.