# Problem: Which equation correctly represents the first electron affinity (EA 1) of calcium?a. Ca(g) + e–  →  Ca–(g)b. Ca(g) →  Ca+(g) + e–c. Ca+(g) + e– → Ca(g)d. Ca(g) →  Ca–(g) + e–e. Ca–(g) → Ca(g) + e–

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###### FREE Expert Solution

We’re being asked to determine the equation representing the first electron affinity of Ca

Recall that electron affinity is the energy change from the addition of 1 e to a gaseous element/ion

It is represented by this chemical equation:

Atom(g) + e  Ion(g), ΔE = –E.A.

###### Problem Details

Which equation correctly represents the first electron affinity (EA 1) of calcium?

a. Ca(g) + e  →  Ca(g)

b. Ca(g) →  Ca+(g) + e

c. Ca+(g) + e– → Ca(g)

d. Ca(g) →  Ca(g) + e

e. Ca(g) → Ca(g) + e

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.

What is the difficulty of this problem?

Our tutors rated the difficulty ofWhich equation correctly represents the first electron affin...as medium difficulty.

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What professor is this problem relevant for?

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