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:Uranium of atom number 92 and mass number 238 emits…What type of bond exits between an element X with…The atomic number of an isotope of hydrogen is equal…Chlorine consisting of two isotope of mass number 35…if an element X with atomic number 13 combines with…