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
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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