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:How many neutrons are present in atom with mass…If 100 atoms of element X contains 70 atoms of 9X…The nucleon number and the proton number of a…The nucleon number and the proton number of a…What type of bond exits between an element X with…