MCQ
Identify the metal that forms colourless compounds.
- AIron (Z = 26)
- BChromium (Z = 24)
- CVanadium (Z = 23)
- DScandium (Z = 21)
✓
Answer
- Scandium (Z = 21)
Explanation:
Scandium(Z = 21) forms colourless compounds.
Scandium(Z = 21) has valence shell electron configuration of 3d14s2
In its +3 oxidation state, it looses 3 electrons and has valence shell electron configuration of 3d°4s°. Since no unpaired electron is present, it forms colourless compounds.
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