1. H Cl O Mg O OH Na O Ca SO4 K NO3 O Cu CO3 NH4 HCO3 O Cation Anion1+ 2+ 2- 1- H Cl O Mg O
Hydrogen
Chloride
Magnesium
Oxide OH Na O Ca
SO4
Hydroxide
Sodium K
NO3 O
Calcium
Sulfate
Potassium
Nitrate Cu
CO3
NH4
HCO3 O
Ammonium
Copper
Carbonate
Hydrogen Carbonate
GZ Science Resources 2012

2. H Cl O Fe Al OH Ag O Zn K NO3 O Fe Pb NH4 HCO3 O Cation Anion Hydrogen1+ 2+ 3+ 1- H Cl O Fe Al
Hydrogen
Chloride
Iron (ll) OH Ag O
Aluminium
Hydroxide
Silver Zn K
NO3 O
Zinc Fe
Potassium
Nitrate Pb
NH4
HCO3 O
Iron (lll)
Ammonium
Lead
Hydrogen Carbonate
GZ Science Resources 2012

3. Instructions for Teachers
Print two sheets for each ion set – either as A3 or A4
Cut out squares on dotted lines and laminate cards
Students can work out formula if given name and vice versa.
Instruct students that all connections need to be filled so write a small 2 after the ion if need 2 (or 3 for 3) and brackets around the compound ions.
No charges are written on the cards – this actually helps the students write the formula without the charges.
The cards are designed so the students put the cation and anion in correct order.
Keep the top border so students line them up in their correct columns to help them remember the charges of each ion.
Once students are proficient they can move onto the standard cross and drop method.
GZ Science Resources 2012