Ionic radii question

  1. When competing the ionic radii of Be+ and B+, which is smaller? I understand there are periodic trends but there is an anomaly in ionization energies b/w B and Be since B has a lone 2p electron. So instead of looking at periodic trends directly, I assessed the proton-electron ratio and found for these cations, Be has a higher ratio (4/3 vs 5/4). This led me to believe Be+ has a smaller ionic radius compared to B+ since there is a stronger general attraction b/w the protons and electrons in this ion.

    Any clarifications and comments on my thought process would be greatly appreciated!
     
  2. jcsd
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