MCAT Question of the Day 255– General Chemistry An atom whose nucleus contains 7 neutrons and which has a mass number of 12 is an isotope of what element?BoronNitrogenMagnesiumPotassiumVote to see resultsVote By admin| 2016-04-06T09:48:17+00:00 April 6th, 2016|Comments Off on MCAT Question of the Day 255– General Chemistry Share This Story, Choose Your Platform! FacebookTwitterGoogle+Email
