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Question:

A list of ionsdecreasing/increasing ionic radius?? ?

AlrightI have a few things I need to do, and I'm not sure how to go about doing themthat's why I'm here! Your help would be appreciated :]First thing I'm supposed to do is figure out whether the following list is in order of increasing or decreasing ionic radiusHow would I know? If you could tell me how that'd be great :]Here it is:7N^3- 8O^2- 9F^- 11Na^+ 12Mg^2+ 13Al^3+And I'm also supposed to figure out the number of electrons in each of the ions aboveHow do I do that? Chemistry is not my forteeheh ~_~Best answer to whomever :]

Answer:

the more shells the wider the radiusso first write out the electronic configuration for each so that is : nitrogen - 2:5.7 electrons .oxygen - 2:6.8 electrons sodium 2:8:1.11 electronsmagnesium - 2:8:2.12 electrons aluminium - 2:8:3.13 electronsin the order of smallest radius to largest radius is: nitrogen ,oxygen,sodium,magnesium,aluminium

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