Use the periodic table to complete these charts. Complete the following charts by counting the atoms in the compounds.



Sodium Oxide - Na2O

Type of atom:
# of atoms:

Total:


Calcium Chloride - CaCl2

Type of atom:
# of atoms:

Total:


Potassium Sulphate K2SO4

Type of atom:
# of atoms:

Total:


Aluminum Iodide - AlI3

Type of atom:
# of atoms:

Total:


NH 4C2 H3O2

Type of atom:
# of atoms:

Total:


2(NH4)2CO3

Type of atom:
# of atoms:

Total:



Pb(NO3)4

Type of atom:
# of atoms:

Total:


3(PO4)2

Type of atom:
# of atoms:

Total:

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

what is the question here. i think you messed up.