He wāhanga o te karihi o te ngota. He whana tōrunga (+) tō te iraoho, he papatipu hoki tōna. Ko te tau iraoho hei whakaatu i te maha o ngā iraoho o tētahi ngota.
This is part of the nucleus of an atom. A proton carries a positive charge and has mass. The atomic number shows how many protons an atom has.