Question

Explain briefly how +2 oxidation state becomes more and more stable in firsthalfofthe firstrowtransition elements with increasing atomic number.

Answer 1

This means the number of electrons in the 3d-orbital also increases from 1 to 5. +2 oxidation state is attained by the loss of the two 4 selectrons by these metals. ... Mn (+2) has d5 electrons (that is half-filled d shell, which is highly stable).