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:An isotope has an atomic number of 15 and a mass…What is the mass number of an element having 20…What type of bond exits between an element X with…Uranium of atom number 92 and mass number 238 emits…An atom 17 protons, 17 electrons and 18 neutrons has…