Which metal is colourless inspite of presence of unpair electrons? a)La b)Eu c)Gd d)Lu
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d) Lu
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valence electron of sc is 3 whileas valence electron of ti is 4
when 3 cl atom form bond b/w both metals then sc has no unpaired and ti has 1 unpaired electron due to this unpaired electron ticl3 is coloured.
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