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:What is the mass number of an element having 20…One mole of a compound M(HCO3)2 has a mass of 162g.…Uranium of atom number 92 and mass number 238 emits…How many protons does 40//20Ca contain?What is the mass number of an element if its atom…