An isotope has an atomic number of 15 and a mass number of 31. The number of protons it contain is? by Sunday | Oct 10 | Chemistry JAMB | 0 comments A. 16 B. 15 C. 46 D. 31 Correct Answer: Option B – 15 Users Also Read These:How many protons does 40//20Ca contain?An atom 17 protons, 17 electrons and 18 neutrons has…Uranium of atom number 92 and mass number 238 emits…What is the mass number of an element if its atom…An isotope has an atomic number of 15 and a mass…