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:The nucleon number and the proton number of a…How many electrons will be found in the nucleus of…The nucleon and proton numbers of a neutral atom of…How many neutrons are present in atom with mass…A particle that contains 11 protons; 12 neutrons and…