Identify the metal that forms colourless compounds.
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Scandium $(Z = 21)$ forms colourless compounds.
Scandium $(Z = 21)$ has valence shell electron configuration of $3d^14s^2$
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 $3d^14s^2$
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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