1. Nov 19, 2006

### ubiquinone

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. $$H^-$$

2. Nov 19, 2006

### Stevedye56

Well have you read about the trend? It will make a lot more sense if you have read the information.

3. Nov 21, 2006

### ubiquinone

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?