Problem: The experimental Bi-I bond length in bismuth triiodide, BiI3, is 2.81 Å. Based on this value and data in the figure, predict the atomic radius of Bi.

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We are asked to predict the atomic radius of Bi.


Bi-I bond length = Bi radius + I radius


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Problem Details

The experimental Bi-I bond length in bismuth triiodide, BiI3, is 2.81 Å. Based on this value and data in the figure, predict the atomic radius of Bi.A periodic table shows that radius increases moving down the columns and left across the rows. Of those shown, Rubidium has the largest radius, and Helium has the smallest.

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

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