9 Magnetic
Properties
Transition metals vary widely in their chemical reactivity Many of
them are sufficiently electropositive to dissolve in mineral acids, although
a few are ‘noble’—that is, they are unaffected by single acids The metals of the first series with the exception of copper are relatively
more reactive and are oxidised by 1M H
+, though the actual rate at
which these metals react with oxidising agents like hydrogen ion (H
+) is
sometimes slow For example, titanium and vanadium, in practice, are
passive to dilute non oxidising acids at room temperature