MCQ
Identify the metal that forms colourless compounds.
- AIron $(Z = 26)$
- BChromium $(Z = 24)$
- CVanadium $(Z = 23)$
- ✓Scandium $(Z = 21)$
✓
Answer
Correct option: D.
Scandium $(Z = 21)$
Scandium$(Z = 21)$ forms colourless compounds.
Scandium$(Z = 21)$ has valence shell electron configuration of $\ce{3d^14s^2}$
In its $+3$ oxidation state, it looses $3$ electrons and has valence shell electron configuration of $3d^\circ 4s^\circ .$ Since no unpaired electron is present, it forms colourless compounds.
Scandium$(Z = 21)$ has valence shell electron configuration of $\ce{3d^14s^2}$
In its $+3$ oxidation state, it looses $3$ electrons and has valence shell electron configuration of $3d^\circ 4s^\circ .$ Since no unpaired electron is present, it forms colourless compounds.
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