Problem: Which electron configuration is incorrect?a. Zn:  [Ar]3d104s2b. Ca:  [Ar]4s2c. Cr:  [Ar]3d44s2d. Ag:  [Kr]4d105s1e. All the above are correct.

FREE Expert Solution

Analyze each given element and the provided electron configuration and determine which is incorrect. 

Recall that the electron configuration must account for the # of electrons present in the atom

If we have a neutral element, we can simply say that atomic # = # of electrons

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Problem Details

Which electron configuration is incorrect?

a. Zn:  [Ar]3d104s2

b. Ca:  [Ar]4s2

c. Cr:  [Ar]3d44s2

d. Ag:  [Kr]4d105s1

e. All the above are correct.

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