Periodic Trend: Ionic Radius Video Lessons

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Problem: Rank the following ions in order of decreasing radius: O2-,S2-,Se2-,Te2-, and Po2-?.

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The size of an atom or ion is dependent upon its position in the periodic table. Properties such as the ionic radius are called periodic trends because they vary as we move along a period or a group.


Ionic radius decreases as we move up a group. This is because the number of energy levels (or shells) decreases as we move up a group.


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Problem Details

Rank the following ions in order of decreasing radius: O2-,S2-,Se2-,Te2-, and Po2-?.

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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 Trend: Ionic Radius concept. You can view video lessons to learn Periodic Trend: Ionic Radius. Or if you need more Periodic Trend: Ionic Radius practice, you can also practice Periodic Trend: Ionic Radius practice problems.

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