A metallic ion Z2+ with an inert gas structure contains 18 electrons. How many protons are contained in this ion? By: Sunday|Published on: Dec 10|Categories: Chemistry WAEC| 0 comments A. 20 B. 18 C. 16 D. 2 Correct Answer: Option A A. 20 Users Also Read These:What is the mass number of an element if its atom…An atom 17 protons, 17 electrons and 18 neutrons has…Protons and electrons are called fundamental…In metallic solids, the forces of attraction are…A particle that contains 9 protons; 10 neutrons and…SEE ALSO In the redox reaction represented by the following equation: Cu²+aq + Zn(s) → Cu(s) + Zn²+