There are many useful applications of the d- and f-block elements and their
compounds, notable among them being in varieties of steels, catalysts, complexes,
organic syntheses, etc 4 1
Write down the electronic configuration of:
(i) Cr3+
(iii) Cu+
(v) Co2+
(vii) Mn2+
(ii) Pm3+
(iv) Ce4+
(vi) Lu2+
(viii) Th4+
4 2
Why are Mn
2+ compounds more stable than Fe
2+ towards oxidation to their
+3 state