What is the ground-state electron configuration of a neutral atom of nickel? Exp

Question

What is the ground-state electron configuration of a neutral atom of nickel? Express your answer in condensed form, in order of increasing orbital energy. For example, (He} 2s^2 2p^2 would be entered as [He]2s^22p^2. What is the ground-slate electron configuration of the sulfide ion S^2? Express your answer in condensed form, in order of increasing orbital energy. For example, (He} 2s^2 2p^2 would be entered as [He]2s^22p^2. Which element has the following configuration [Xe]6s^2 4f^7 5d^1? Enter the chemical symbol for the element.

Explanation / Answer

A) Ni = 28 atomic number = [Ar]4s23d8

B) S-2  = 16 atomic number of S = [Ne]3s23p6   = [Ar]

C ) [Xe]6s24f75d1  = 54 + 2 + 7 + 1 = 64 = Gd

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