10/21/11
Post date: Oct 24, 2011 1:29:59 AM
Bell ringer (verbal): what is the name and formula of the compound formed by Magnesium and Fluorine?
Transition metals
Elements in the middle of the periodic table
No regular pattern of valence numbers
Many elements have multiple possible valence numbers (example: Iron sometimes has 2 valence electrons, and sometimes has 3)
Transition metals are named using roman numerals to indicate which valence number that sample has (example: the Iron with 2 valence electrons is Iron (II), the one with 3 valence electrons is named Iron (III) )
Transition metals assignment - write the formulas for the following compounds:
Iron (III) oxide
Iron (II) oxide
Nickel (IV) chloride
Zinc (II) sulfide
Copper (I) nitride