Multiple Choice
What is the number of d-orbital electrons in the complex Os(O)(NH3)3?
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24. Transition Metals and Coordination Compounds
Electron Configurations of Transition Metals
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What is the ground-state electron configuration for the vanadium 2+ ion?
A
[Ar]3s23d1
B
[Ar]4s23d5
C
[Ar]4s13d2
D
[Ar]4s03d3
E
[Kr]5s04d3
Verified step by step guidance1
Identify the atomic number of vanadium, which is 23. This means a neutral vanadium atom has 23 electrons.
Write the electron configuration for a neutral vanadium atom. The configuration is: [Ar]4s23d3.
Understand that the 2+ charge on the vanadium ion indicates it has lost 2 electrons.
Remove electrons starting from the highest energy level. In this case, electrons are removed from the 4s orbital before the 3d orbital.
After removing 2 electrons from the 4s orbital, the electron configuration for the vanadium 2+ ion becomes: [Ar]3d3.
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