The ion of element X has a charge and contains protons

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

Problem

The ion of element X has a 2+2+ charge and contains 2020 protons. Give the full electron configuration of this ion. (1) 1s22s22p63s23p61s^22s^22p^63s^23p^6 (2) 1s22s22p63s23p64s21s^22s^22p^63s^23p^64s^2 (3) 1s22s22p63s23p63d21s^22s^22p^63s^23p^63d^2 (4) 1s22s22p63s23p64s23d21s^22s^22p^63s^23p^64s^23d^2

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