Problem: Why are Se2- and Br- are about the same size?

FREE Expert Solution

We’re being asked to explain why Se2- and Br- are about the same size


Recall that ionic radius is the size of an ion. The trend for ionic radius is as follows: it increases from right to left and down a period in the periodic table. Ionic radius also increases with increasing number of electrons.


For this problem, we need to determine the electrons in each species and use it for comparison.



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Problem Details

Why are Se2- and Br- are about the same size?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Periodic Trends: Ionic Radius concept. You can view video lessons to learn Periodic Trends: Ionic Radius. Or if you need more Periodic Trends: Ionic Radius practice, you can also practice Periodic Trends: Ionic Radius practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Blankenship's class at UGA.