Some elements have electron configurations that deviate from normal electron filling rules. Which element has the ground-state electron configuration [Ar]4s¹3d¹⁰? A)Ni B)Ag C)Cd D)Sn E)Cu

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The electron configuration given is unusual because it has a completely full 3d subshell (d10) instead of the expected d9 in a typical filling pattern. Copper (Cu) is known for having this configuration, and is located in the same group as silver (Ag). However, Cd, Ni, and Sn do not have this type of deviation in their electron configurations.

Some Elements Have Electron Configurations That Deviate from Normal Electron