How will the mass of a rusted iron nail compare with the mass of the same nail before it rusted?

Arusted iron nail will weigh slightly more than a non rusted iron nail of the same initial mass as the rusted iron nail has addition oxygen that has bonded to the nail increasing its overall weight. 

Protons have a positive charge and, collectively, give an element its atomic number.

What do you mean there’s no jelly beans