How many protons does 40//20Ca contain? by Sunday | May 9 | Chemistry WAEC | 0 comments A. 20 B. 30 C. 40 D. 60 Correct Answer: Option A A. 20 Users Also Read These:Which of the following feedstuffs does not contain…An atom X consists of 6 protons, 6 electrons and 7…How many protons, neutrons and electrons…How many carbon atoms does the parent chain contain?A metallic ion Z2+ with an inert gas structure…