Which of the following atoms has exactly two unpaired electrons in the ground electronic state? Mg S Ga He V
Question
Which of the following atoms has exactly two unpaired electrons in the ground electronic state?
- Mg
- S
- Ga
- He
- V
Solution
To answer this question, we need to look at the electron configuration of each atom.
- Mg (Magnesium) - [Ne] 3s². All electrons are paired.
- S (Sulfur) - [Ne] 3s² 3p⁴. There are two unpaired electrons in the 3p orbital.
- Ga (Gallium) - [Ar] 3d¹⁰ 4s² 4p¹. There is one unpaired electron in the 4p orbital.
- He (Helium) - 1s². All electrons are paired.
- V (Vanadium) - [Ar] 3d³ 4s². There is one unpaired electron in the 3d orbital.
So, the atom with exactly two unpaired electrons in the ground electronic state is Sulfur (S).
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