The atomic number of iron is 56. The number of unpaired electrons in the Fe3+ ion is? by Sunday | Apr 20 | Chemistry NECO | 0 comments A. 1 B. 2 C. 3 D. 4 E. 5 Correct Answer: Option C – 3 Users Also Read These:The atomic number of chlorine is 17. What is the…The atomic number of chlorine is 17. What is the…The electronic configuration of an element is 1S²…Uranium of atom number 92 and mass number 238 emits…If the electron configuration of an element is p1s²…