Question 7.PS.7: Electron Configurations Using only Figure 7.16 and the perio......

Principles of Chemistry The Molecular Science [1096176]

Electron Configurations

Using only Figure 7.16 and the periodic table as a guide, give the complete electron configuration, orbital box diagram, and noble gas notation for vanadium, V.

7.16

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1s^22s^22p^63s^23p^63d^34s^2

[Ar] 3d^34s^2

Strategy and Explanation The periodic table shows vanadium in the fourth period with atomic number 23. Therefore, vanadium has 23 electrons. Applying Figure 7.16, the first 18 are represented by $1s^22s^22p^63s^23p^6$ , the electron configuration of argon, Ar, the noble gas that precedes vanadium. The last five electrons in vanadium have the configuration $3d^34s^2$ . The orbital box diagram shown above follows from the total electron configuration.

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