# How do the electronic structures of the atoms of a metallic element change when they react?

Sep 16, 2017

Metals are usually oxidized......

#### Explanation:

And oxidation involves the LOSS of the valence electrons, cf.

$C a \rightarrow C {a}^{2 +} + 2 {e}^{-}$ or......

$F e \rightarrow F {e}^{2 +} + 2 {e}^{-}$

$F e \rightarrow F {e}^{3 +} + 3 {e}^{-}$

And for every oxidation reaction, there is a corresponding reduction reaction, usually of dioxygen to give the metal oxide, i.e. for iron to give rusts.....

Would the ionic radius be greater or less than the metallic radius? Why?