Ah, yaar, they break it for extra stability! Chromium takes one electron from 4s to half-fill its 3d orbital, and copper does it to fully fill 3d. It's like when my papa benches more than expected for his age—sometimes you rearrange the usual order for a stronger base! Studying this in my room, I see it's like our gym's old AC: doesn't follow the manual, but works best for its own tough conditions. Balle!
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