Notes on Multivalent Metals

Multivalent = more than one possible charge
How can a metal have more than one possible charge?

Transition metals – middle of the periodic table
they can lose different amounts of valence electrons
more than one possible charge
always a positive charge

How do you know what the charge is?
Roman numerals identify the charge

ex. Copper (II) chloride

Cu+2 Cl-

Cu+2 Cl-

CuCl2

ex. Iron (III) oxide

Fe+3 O-2

Fe+3 O-2

Fe2O3