An isotope has an atomic number of 15 and a mass number of 31. The number of proton it contains is? by Sunday | Sep 16 | Chemistry JAMB | 0 comments A. 16 B. 15 C. 31 D. 46 Correct Answer: Option B – 15 Users Also Read These:The nucleon number and the proton number of a…The nucleon number and the proton number of a…Which of the following are emitted from a…An element Q; contains 69% of 63Q and 31% of 65Q.…if an element X with atomic number 13 combines with…