An element and its isotope only differ in the number of? by Sunday | Nov 3 | Physics JAMB | 0 comments A. protons B. electrons C. ions D. neutrons Correct Answer: Option D – neutrons Users Also Read These:Chlorine consisting of two isotope of mass number 35…Allotropes of an element differ in their?The nucleon number and the proton number of a…The mass of an element is 27 and its atomic number…If the relative molecular mass of an element is not…