alleryUnder the IUPAC definition, a transition metal has an incomplete d subshell in which species?
AOnly highest ion
BOnly its +2 ion
CAtom or its ions
DOnly neutral atom
Answer & Solution
Correct answer: C. Atom or its ions
IUPAC counts a metal as transitional if the d subshell is incomplete either in the neutral atom or in any of its ions.
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