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:An atom W has 17 electrons and 18 neutrons. Which of…A particle that contains 11 protons; 12 neutrons and…A particle that contains 9 protons, 10 neutrons and…What is the mass number of an element having 20…How many neutrons are present in atom with mass…