Ionic Radius: Ordering Cl-, Be2+, Li+, F-, H-

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    Ionic Radius
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The discussion centers on the ordering of ionic radii for the ions Cl^-, Be^{2+}, Li^+, F^-, and H^-. The proposed order is Cl^-, H^-, F^-, Li^+, Be^{2+}, but there is uncertainty regarding the position of the hydride ion (H^-). The original poster expresses confusion due to differing opinions, particularly from their chemistry teaching assistant, who believes H^- should be last. The conversation highlights the complexity and potential controversy surrounding the ionic radius of H^-. Understanding periodic trends is essential for accurately determining ionic sizes.
ubiquinone
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Hi I have a question involving periodic trends. This time the trend is on ionic radius. I'm not sure I got this right so I was wondering if anyone here may please offer their advice. Thank you!

Question:
Order each of the following ions according to largest to smallest.
A. Cl^-
B. Be^{2+}
C. Li^+
D. F^-
E. H^-
 
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Well have you read about the trend? It will make a lot more sense if you have read the information.
 
I have read the trend and I think the answer should be Cl-, H-, F-, Li+, Be2+.

However, I am not sure about this, because of the hydride. I heard that there is some controversy as what is the actual ionic radius. I just wanted to see if anyone here came up with the same order.

However, my chem TA disagreed and thinks the hydride should be last. What do you guys think?
 
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