Nuclear properties homepage › Forums › nuclear properties › Nuclear properties This topic has 0 replies, 1 voice, and was last updated 5 years, 3 months ago by marco.lantieri. Viewing 1 post (of 1 total) Author Posts February 26, 2018 at 9:19 am #797 Score: 0 marco.lantieriParticipant The nucleus has positive charge and it contains almost the whole mass of the atom. Nuclei of isotopes differ one from the other by the number of neutrons; so, they have the same charge value but different mass. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In