An atom 17 protons, 17 electrons and 18 neutrons has a mass number of? by Sunday | Aug 22 | Chemistry WAEC | 0 comments A. 17 B. 18 C. 34 D. 35 E. 52 Correct Answer: Option D – 35 Users Also Read These:How many electrons will be found in the nucleus of…What is the mass number of an element if its atom…How many neutrons are present in atom with mass…How many protons, neutrons and electrons…An atom X consists of 6 protons, 6 electrons and 7…