The nucleon number and the proton number of a neutral atom of an element are 23 and 11 respectively. How many neutrons are present in the atom? by Sunday | May 23 | Physics WAEC | 0 comments A. 11 B. 12 C. 23 D. 34 Correct Answer: Option B B. 12 Users Also Read These:What is the mass number of an element having 20…An isotope has an atomic number of 15 and a mass…The nucleon and proton numbers of a neutral atom of…An element of nucleon number P and atomic number Q…An atom W has 17 electrons and 18 neutrons. Which of…