This is such an amazing post! I can tell you put time and effort into this, and well...that's also amazing! It's definitely a reminder; I haven't actually study about atoms in like 2-3 years, so its good to get the recap. And well to be honest about another thing, I had no clue there was a such thing as "first ionization energy," so thanks for that!
RE: The Patterns of the Modern Periodic Table Part 2 (Let's Learn Series #20 - Chemistry)