Problem: Which element has the greatest electron affinity (most negative ∆E)?a. Na or Clb. Sr or Ba

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Electron affinity is the energy required to add 1 mole of electrons to a gaseous element. Let's recall the trend of electron affinity in the periodic table:

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Problem Details

Which element has the greatest electron affinity (most negative ∆E)?

a. Na or Cl

b. Sr or Ba

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