The electron configuration of an atom tells us how many electrons are in each or

Question

The electron configuration of an atom tells us how many electrons are in each orbital. For example, helium has two electrons in the 1s orbital. Therefore the electron configuration of He is 1s2. What is the ground-state electron configuration of a neutral atom of cobalt? Express your answer in condensed form, in order of increasing orbital energy. What is the ground-state electron configuration of the oxide ion O2- ? Express your answer in condensed form, in order of increasing orbital energy. Which element has the following configuration: [Xe]6s24f-15d1 ? Enter the chemical symbol for the element.

Explanation / Answer

A) [Ar]4s^23d^7 B) [He]2s^22p^6 C) Cerium (Ce)

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