Which is the correct electron configuration for chromium?

CHEMISTRY · Single correct · AP · Chemistry · Atomic Structure and Properties · Atomic Structure and Properties

Problem

Which is the correct electron configuration for chromium? (1) 1s2 2s2 2p6 3s2 3p6 4s2 3d41s^2\,2s^2\,2p^6\,3s^2\,3p^6\,4s^2\,3d^4 (2) 1s2 2s2 2p6 3s2 3p6 3d61s^2\,2s^2\,2p^6\,3s^2\,3p^6\,3d^6 (3) 1s2 2s2 2p6 3s2 3p6 4s1 3d51s^2\,2s^2\,2p^6\,3s^2\,3p^6\,4s^1\,3d^5 (4) 1s2 2s2 2p6 3s2 3p6 4s2 4p41s^2\,2s^2\,2p^6\,3s^2\,3p^6\,4s^2\,4p^4

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