What the symbol for the ion with 19 protons and 18 electrons?

1 Answer
Aug 2, 2018


Well, what does your Periodic Table say? There should be one beside you now.


There are 19 protons, i.e. #Z=19#. The element is NECESSARILY potassium. There is ONE less electron than the defining nuclear charge, so we got #K^+#. What is the symbol for the ion with 26 nuclear charges, and 23 electrons?