Electron Configurations

Give the electron configuration, the number of valence electrons, and also state whether the element is diamagnetic or paramagnetic:

Fe

O

Ar

Al

Give the electron configuration, the number of valence electrons, and state whether the ion is diamagnetic or paramagnetic for the following ions:

Mg$^{+2}$

O$^{-2}$

Cl$^{-1}$

Al

Give the electron configuration, the number of valence electrons, and state diamagnetic or paramagnetic for the following elements and ions:

Cr

Cr$^{+2}$

Cu

Cu$^{+1}$