Problem: Using only the periodic table, rank the following elements in order of increasing size: Fe, K, Rb, S, and Se.

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Using only the periodic table, rank the following elements in order of increasing size: Fe, K, Rb, S, and Se.

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