write the quantum no. for the electron of highest energy is scandium
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Explanation:
SC+ion has configuration.
The higest energy electron is in 4n.
therefore , set of quantum number is n=4,
l=0 , m=o , s=1/2, or 1/2
during , ionization ,electron is removed first form 4s orbital only . although 3d is filled after 4s.
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