2. Which equation below represents the electron affinity for potassium?K( g ) ® K+( g ) + e-K( g ) + e- ® K-( g )K+( g ) + e- ® K( g )K-( g ) ® K( g ) + e-
Question
- Which equation below represents the electron affinity for potassium?K( g ) ® K+( g ) + e-K( g ) + e- ® K-( g )K+( g ) + e- ® K( g )K-( g ) ® K( g ) + e-
Solution
The equation that represents the electron affinity for potassium is:
K(g) + e- ® K-(g)
This equation represents the process of a gaseous potassium atom (K) gaining an electron (e-) to form a potassium ion (K-). Electron affinity generally refers to the energy change associated with the addition of an electron to a gaseous atom.
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