Choose the ground state electron configuration for Rf²⁺. A) [Rn]7s² B) [Rn]7s²6d² C) [Rn]6d² D) [Rn] E) [Rn]7s²6d⁴

Question

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To determine the ground state electron configuration, we need to start by arranging the electrons according to the Aufbau Principle, which states that each electron occupies the lowest energy level available.

Rf: [Rn]7s²5f¹⁴6d²
S1: 7s¹
U1: 6d³
P12: 5f⁶6d⁰7s²
S1: 7s¹
S1: 7s¹
P0⁺: 5f⁶6d⁰7s²

Ignoring the noble gas configuration ([Rn]), we can see that the electrons fill up the 6d sublevel before filling up the 7s sublevel. Therefore, the best choice is C, which shows the 6d sublevel filled before the 7s sublevel. The other choices do not follow this pattern or include extra electrons that should not be present in the ion.

Choose the Ground State Electron Configuration for Rf2⁺

Choose the Ground State Electron Configuration for Rf²⁺