A metallic ion Z2+ with an inert gas structure contains 18 electrons. How many protons are contained in this ion? by Sunday | Dec 10 | Chemistry WAEC | 0 comments A. 20 B. 18 C. 16 D. 2 Correct Answer: Option A A. 20 Users Also Read These:An atom X consists of 6 protons, 6 electrons and 7…An atom 17 protons, 17 electrons and 18 neutrons has…What is the mass number of an element if its atom…What is the mass number of an element having 20…A particle that contains 9 protons, 10 neutrons and…