Electron Configurations of Atoms and lons 24 of 28 Constants Periodic Table Part

Question

Electron Configurations of Atoms and lons 24 of 28 Constants Periodic Table Part B 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 the sulfide ion S2-? Express your answer in condensed form, in order of increasing orbital energy. For example, [He 2s22p2 should be entered as He 2s 22p2. View Available Hint(s) Submit Part C Which element has the following configuration: [Xe|6s24f5 Enter the chemical symbol for the element. View Available Hints) Submit Provide Feedback Next>

Explanation / Answer

Answer to Part B: The electronic configuration of Sulphur (S) is:

1s^2 2s^2 2p^6 3s^2 3p^4

As 2 electrons are added in sulphide ion (S-) so it has the configuration as: 1s^2 2s^2 2p^6 3s^2 3p^6

2 electrons being added to valence shell.

Answer to Part C: Promethium having atomic number 61 is having electronic configuration: [Xe] 6s^2 4f^5

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