Chemistry MCQS - QUESTION DETAILS

Which element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s²?
A. Radium
B. Actinium
C. Thorium
D. Uranium

Actinium has this electron configuration.

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