Procedure:  use the Periodic Table Placemat on some of the questions below and answer the following questions. 

1. Minerals are usually made of compounds.  In the area below list the cation and anion of the minerals listed with their chemical formula.  (The subscript number has nothing to do with figuring out the cation and anion.)

   MINERAL	Chemical formula	Cation	Anion
   Hematite	Fe2O3	Fe	O
   halite	NaCl
   quartz	SiO2
   pyrite	FeS2
   galena	PbS
   fluorite	CaF2

    

2. Why are elements in Group 18 usually not part of a compound?
   
    
3. State whether the following is a monatomic ion and polyatomic ion.

    

   	Monatomic or Polyatomic?
   Fe+3	monatomic
   Fe+2
   NO3-1
   SO4-2
   Na+1
   PO4-3
   Al+3
   CO3-2
   H+1
   Sn+4
   OH-1

    

4. Look at the recommended Periodic Table of the Elements find bolder lines that divide the simplified “metals” with “nonmetals” that generalizes which groups are the cations and which ones are usually anions, but could have cations.  On the table below show that division.  Color anions red and cations blue (only naturally occurring).

   Note that Noble Gases do not usually combine, so exclude that group.

   
    

5. Look at the table below and determine if it is likely that these 2 elements could be part of a compound.
    

   Element 1	Write element	Element 2	Write element	Could this become a compound
   Fe	Iron	Co	Cobalt	no
   Ca		O
   Re		Ir
   Ce		Ru
   Ca		F
   Mg		O
   Ba		La
   Na		Mg
   Na		I
   W		Xe
   Au		Ag