Electronic configuration for Cr, Cu, Cr+2, Cu+2, Mn+2

Chromium (Cr) : 2, 8, 8, 6

Copper (Cu) : 2, 8, 8, 11

Chromium+2 (Cr+2) : 2, 8, 8, 4 (if the ion retains a positive charge then the amount of electrons will decrease)

Copper+2 (Cu+2) : 2, 8, 8, 9

Manganese+2 (Mn+2) : 2, 8, 8, 5

The electron configuration for the following elements and ions:

Cr 2-8-13-1

Cu 2-8-18-1

Cr+2 2-8-12

Cu+2 2-8-17

Mn+2 2-8-13

a positive sign next to an atom indicates that it lost electrons.

a negative sign indicates that it gained electrons