Question

explain the general trends in the following properties of the first series of transition elements.1)stability of +2 oxidation state. 2)formation of oxometal ions.

Answer 1

Stability of +2 oxidation state increases with increase in atomic no. due to subsequent filling of d orbital in the first transition series. Mn also has the most stable oxidation state +2 due to exactly half filled d orbital.

The ability to bond to oxygen atoms increases with increasing atomic no. upto Mn which can bind to 4 O atoms. beyond which it decreases due to filling of d shell.