What is the correct full electron configuration of titanium

CHEMISTRY · Single correct · A Level · Chemistry · Atomic structure · Atomic structure

Problem

What is the correct full electron configuration of titanium, atomic number 2222? (1) 1s2 2s2 2p6 3s2 3p6 4s2 3d21s^2\,2s^2\,2p^6\,3s^2\,3p^6\,4s^2\,3d^2 (2) 1s2 2s2 2p6 3s2 3p6 3d41s^2\,2s^2\,2p^6\,3s^2\,3p^6\,3d^4 (3) 1s2 2s2 2p6 3s2 3p6 4s1 3d31s^2\,2s^2\,2p^6\,3s^2\,3p^6\,4s^1\,3d^3 (4) 1s2 2s2 2p6 3s2 3p6 4s41s^2\,2s^2\,2p^6\,3s^2\,3p^6\,4s^4

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