How many total electrons are in a # Ba^(2+)# ion? Chemistry The Periodic Table Periodic Trends in Ionization Energy 1 Answer anor277 Nov 3, 2016 #"54 electrons"# Explanation: For barium, #Z=56#. The dication, therefore, will necessarily have #56-2# electrons. Answer link Related questions How does ionization energy relate to reactivity? What is ionization energy measured in? What are the first and second ionization energies? How does ionization energy increase? How does ionization energy change down a group? How do trends in atomic radius relate to ionization energy? Question #44238 Question #fbdfe Question #1a23b Question #d7de9 See all questions in Periodic Trends in Ionization Energy Impact of this question 12839 views around the world You can reuse this answer Creative Commons License